An Experimental (easily rigorizable) proof of Armin Straub's conjecture tha\ t the number of (2k+1,2k+3)-core partitions into distinct parts equals 4^k, by checking it up to, k = 200 By Shalosh B. Ekhad Let a(k) be the number of (2k+1,2k+3)-core partitions into distinct parts The set of differences a(k)-4^k is, from k=1 to k=, 200, is {0} This took, 5.283, seconds.