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 A178125 #2 Mar 30 2012 18:59:27 %S A178125 1,1,1,2,3,1,5,11,6,1,16,45,34,10,1,61,208,197,81,15,1,269,1068,1204, %T A178125 626,165,21,1,1337,6017,7810,4863,1640,302,28,1,7354,36801,53762, %U A178125 38742,15781,3760,511,36,1,44155,242242,391797,319197,151487,43962,7805,814 %N A178125 Inverse of coefficient array of orthogonal polynomials P(n,x)=(x-n)*P(n-1,x)-(2n-3)*P(n-2,x), P(0,x)=1,P(1,x)=x-1. %C A178125 Inverse is A178124. First column is A178123. %e A178125 Triangle begins %e A178125 1, %e A178125 1, 1, %e A178125 2, 3, 1, %e A178125 5, 11, 6, 1, %e A178125 16, 45, 34, 10, 1, %e A178125 61, 208, 197, 81, 15, 1, %e A178125 269, 1068, 1204, 626, 165, 21, 1, %e A178125 1337, 6017, 7810, 4863, 1640, 302, 28, 1, %e A178125 7354, 36801, 53762, 38742, 15781, 3760, 511, 36, 1 %e A178125 Production matrix is %e A178125 1, 1, %e A178125 1, 2, 1, %e A178125 0, 3, 3, 1, %e A178125 0, 0, 5, 4, 1, %e A178125 0, 0, 0, 7, 5, 1, %e A178125 0, 0, 0, 0, 9, 6, 1, %e A178125 0, 0, 0, 0, 0, 11, 7, 1, %e A178125 0, 0, 0, 0, 0, 0, 13, 8, 1, %e A178125 0, 0, 0, 0, 0, 0, 0, 15, 9, 1 %K A178125 nonn,tabl %O A178125 0,4 %A A178125 _Paul Barry_, May 20 2010