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 A178124 #2 Mar 30 2012 18:59:27 %S A178124 1,-1,1,1,-3,1,0,7,-6,1,-5,-13,26,-10,1,25,11,-101,69,-15,1,-105,76, %T A178124 383,-425,150,-21,1,460,-758,-1494,2599,-1310,286,-28,1,-2315,5536, %U A178124 6215,-16761,11129,-3325,497,-36,1,13935,-40769,-27989,118079,-97272,36764 %N A178124 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 A178124 Inverse is A178125. %e A178124 Triangle begins %e A178124 1, %e A178124 -1, 1, %e A178124 1, -3, 1, %e A178124 0, 7, -6, 1, %e A178124 -5, -13, 26, -10, 1, %e A178124 25, 11, -101, 69, -15, 1, %e A178124 -105, 76, 383, -425, 150, -21, 1, %e A178124 460, -758, -1494, 2599, -1310, 286, -28, 1, %e A178124 -2315, 5536, 6215, -16761, 11129, -3325, 497, -36, 1 %e A178124 Production matrix of inverse is %e A178124 1, 1, %e A178124 1, 2, 1, %e A178124 0, 3, 3, 1, %e A178124 0, 0, 5, 4, 1, %e A178124 0, 0, 0, 7, 5, 1, %e A178124 0, 0, 0, 0, 9, 6, 1, %e A178124 0, 0, 0, 0, 0, 11, 7, 1, %e A178124 0, 0, 0, 0, 0, 0, 13, 8, 1, %e A178124 0, 0, 0, 0, 0, 0, 0, 15, 9, 1 %K A178124 sign,tabl %O A178124 0,5 %A A178124 _Paul Barry_, May 20 2010