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 A119832 #2 Mar 30 2012 18:59:15 %S A119832 1,-6,1,0,-120,1,0,0,-504,1,0,0,0,-1320,1,0,0,0,0,-2730,1,0,0,0,0,0, %T A119832 -4896,1,0,0,0,0,0,0,-7980,1,0,0,0,0,0,0,0,-12144,1,0,0,0,0,0,0,0,0, %U A119832 -17550,1,0,0,0,0,0,0,0,0,0,-24360,1 %N A119832 Bi-diagonal inverse of (3n)!/(3k)!. %C A119832 Row sums are 1-A054776(n). Inverse of A119831. %F A119832 Column k has g.f. x^k(1-b(k+1)x) where b(n)=3n(3n-2)(3n-1)=A054776(n). %e A119832 Triangle begins %e A119832 1, %e A119832 -6, 1, %e A119832 0, -120, 1, %e A119832 0, 0, -504, 1, %e A119832 0, 0, 0, -1320, 1, %e A119832 0, 0, 0, 0, -2730, 1, %e A119832 0, 0, 0, 0, 0, -4896, 1, %e A119832 0, 0, 0, 0, 0, 0, -7980, 1, %e A119832 0, 0, 0, 0, 0, 0, 0, -12144, 1, %e A119832 0, 0, 0, 0, 0, 0, 0, 0, -17550, 1, %e A119832 0, 0, 0, 0, 0, 0, 0, 0, 0, -24360, 1 %K A119832 easy,sign,tabl %O A119832 0,2 %A A119832 _Paul Barry_, May 25 2006