> #Attendence Q1:
> #Who was Dr.Z 's neighbor in 1980? 
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> #What did he reply to Dr. Z when asked how many ways to break up russian dolls. 
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> #Ans: Professor George Spansor. It brings a Bell question.
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> 
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> 
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> #Attendence Q2:
> #What is the A-number in the OEIS?
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> #Ans: A110
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> 
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> 
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> #Attendence Q3:
> #Which of  Z(r)  except for r=1 in the OEIS?
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> #For each of them, list the A-number.,
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> #Ans: 
> #Z(r) for r = 2, 3, 4 ... not in OEIS 
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> Z(1)
1, 2, 5, 15, 52, 203, 877, 4140, 21147, 115975, 678570, 4213597, 27644437, 
190899322, 1382958545, 10480142147, 82864869804, 682076806159, 5832742205057, 
51724158235372

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> Z(2) 
1, 2, 11, 87, 952, 13513, 237113, 5016728, 125121009, 3615047527, 119384499720,
4455637803543, 186152008588691, 8636436319397292, 441871067839416319, 
24781002306869712365, 1515279889256750470086, 100546673139756241189021, 
7209605987244352052104275, 556516294632874102717412282

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> Z(3)
1, 2, 29, 561, 20002, 1036793, 73149211, 7001620230, 851266098273, 
129480967191991, 24185129583364026, 5424056667552385525, 1443073264349607373459
, 450080587782825702959428, 162652881944216945326739621, 
67512255613290113392967055419, 31932249941295949652321672992764, 
17083534258217238214530371473504729, 10272162669894535616904349293826548581, 
6902795139982079095540153002938846571784

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> Z(4)
1, 2, 83, 3699, 451252, 84434773, 23614898645, 10463322887972, 6112163811896661
, 4903431947965569559, 5212404842475146112216, 6985594807709708763240759, 
11849009064222175198435274519, 24898173439275578749885971467688, 
63434260177419240237729022637336167, 194898919300342257733730608874815122245, 
713766524380274106820586177019487722185526, 
3077089794688695898588185655295779392820746841, 
15512913331699241710807710362523795683727445460571, 
90790268446931656016422321758621840572313807902435786

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