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 A169589 #3 Sep 08 2013 13:31:50
%S A169589 1,1,1,2,1,1,5,2,3,1,14,5,9,3,1,42,14,28,9,5,1,132,42,90,28,20,5,1,
%T A169589 429,132,297,90,75,20,7,1,1430,429,1001,297,275,75,35,7,1,4862,1430,
%U A169589 3432,1001,1001,275,154,35,9,1,16796,4862,11934,3432,3640,1001,637,154,54,9,1
%N A169589 A number triangle with repeated columns of triangle in A039599.
%C A169589 Row sums : A135339.
%F A169589 Sum_{k, 0<=k<=n} T(n,k)= A135339(n+1). T(n,0)= A000108(n).
%e A169589 Triangle begins : 1 ; 1,1 ; 2,1,1 ; 5,2,3,1 ; 14,5,9,3,1 ; 42,14,28,20,5,1 ; ...
%Y A169589 Cf. A000012, A109613, A000108
%K A169589 nonn,tabl
%O A169589 0,4
%A A169589 _Philippe Deléham_, Dec 02 2009
%E A169589 Corrected by _Philippe Deléham_, Dec 04 2009