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 A178104 #2 Mar 30 2012 18:59:27 %S A178104 1,0,1,1,0,1,0,4,0,1,4,0,9,0,1,0,31,0,16,0,1,31,0,111,0,25,0,1,0,364, %T A178104 0,286,0,36,0,1,364,0,1794,0,610,0,49,0,1,0,5746,0,6064,0,1149,0,64,0, %U A178104 1,5746,0,36066,0,16405,0,1981,0,81,0,1,0,113944,0,150901,0,38196,0,3196 %N A178104 Inverse of coefficient array of orthogonal polynomials P(n,x)=x*P(n-1,x)-(2n-3)*P(n-2,x), P(0,x)=1,P(1,x)=x. %C A178104 Inverse is A178103. First row is aerated version of A128709. %e A178104 Triangle begins %e A178104 1, %e A178104 0, 1, %e A178104 1, 0, 1, %e A178104 0, 4, 0, 1, %e A178104 4, 0, 9, 0, 1, %e A178104 0, 31, 0, 16, 0, 1, %e A178104 31, 0, 111, 0, 25, 0, 1, %e A178104 0, 364, 0, 286, 0, 36, 0, 1, %e A178104 364, 0, 1794, 0, 610, 0, 49, 0, 1 %e A178104 Production matrix is %e A178104 0, 1, %e A178104 1, 0, 1, %e A178104 0, 3, 0, 1, %e A178104 0, 0, 5, 0, 1, %e A178104 0, 0, 0, 7, 0, 1, %e A178104 0, 0, 0, 0, 9, 0, 1, %e A178104 0, 0, 0, 0, 0, 11, 0, 1, %e A178104 0, 0, 0, 0, 0, 0, 13, 0, 1, %e A178104 0, 0, 0, 0, 0, 0, 0, 15, 0, 1 %K A178104 nonn,tabl %O A178104 0,8 %A A178104 _Paul Barry_, May 20 2010