The first, 30, terms, starting at n=1, of the sequence "Number of INEQUIVALEN\
    T Larcombe relations for am n by n matrix", equivalently

The number of UNLABELED loopless directed graphs on n vertices with n edges is as follows



[0, 1, 4, 27, 154, 1043, 6940, 48886, 353315, 2645480, 20427684, 162850919, 
1339166412, 11358202660, 99312786821, 894750719339, 8300578202141, 
79229754454034, 777440888160940, 7835178152035501, 81026397843312300, 
859005406782553918, 9327442383446533036, 103644875036271336474, 
1177583840334287027293, 13669578426368408996619, 162001404527636883450330, 
1958771952647475488368419, 24147400203822013999129399, 
303330358161202990605455860]


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                         This took, 163.924, seconds.