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Main diagonal of irregular triangle A303650.
3

%I #6 Apr 30 2018 21:10:43

%S 1,3,15,100,840,8589,104104,1463760,23457780,422352880,8443603509,

%T 185620024044,4450814005365,115607871091860,3233811469903935,

%U 96919878129098048,3098520826729103844,105255099799959987720,3785952834976524485140,143750180460098987633040,5745630052052437089326175,241143250707191288860686084,10603124545177769605263358275,487432649463606266257377179400

%N Main diagonal of irregular triangle A303650.

%H Paul D. Hanna, <a href="/A303651/b303651.txt">Table of n, a(n) for n = 0..50</a>

%Y Cf. A303650, A303652.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Apr 30 2018