This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A100937 #4 Mar 30 2012 18:36:44
%S A100937 1,3,14,76,435,2577,15678,97272,612126,3891890,24933292,160663328,
%T A100937 1040074684,6759228932,44075916696,288289595968,1890894150707,
%U A100937 12434303045721,81960791460442,541428229233012,3583843659376257
%N A100937 Main diagonal of symmetric square array A100936.
%F A100937 a(n) = Sum_{k=0..n} C(n, k)^2*A051162(k).
%e A100937 a(3) = 76 = 1*1 + 3^2*2 + 3^2*5 + 1*12 = Sum_{k=0..3} C(3,k)^2*A051163(k).
%e A100937 a(4) = 435 = 1*1 + 4^2*2 + 6^2*5 + 4^2*12 + 1*30 = Sum_{k=0..4} C(4,k)^2*A051163(k).
%o A100937 (PARI)
%Y A100937 Cf. A051163, A100936.
%K A100937 nonn
%O A100937 0,2
%A A100937 _Paul D. Hanna_, Nov 23 2004