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 A176491 #9 Jun 17 2015 04:03:49 %S A176491 1,1,1,1,10,1,1,35,35,1,1,104,300,104,1,1,297,1992,1992,297,1,1,846, %T A176491 11747,25982,11747,846,1,1,2431,64969,275375,275375,64969,2431,1,1, %U A176491 7060,346246,2573576,4831272,2573576,346246,7060,1,1,20693,1804214,22163246 %N A176491 Triangle T(n,k) = binomial(n,k) + A176490(n,k) - 1 read along rows 0<=k<=n. %C A176491 Row sums are 1, 2, 12, 72, 510, 4580, 51170, 685552, 10685038, 189423852, 3755809002,.... %e A176491 1; %e A176491 1, 1; %e A176491 1, 10, 1; %e A176491 1, 35, 35, 1; %e A176491 1, 104, 300, 104, 1; %e A176491 1, 297, 1992, 1992, 297, 1; %e A176491 1, 846, 11747, 25982, 11747, 846, 1; %e A176491 1, 2431, 64969, 275375, 275375, 64969, 2431, 1; %e A176491 1, 7060, 346246, 2573576, 4831272, 2573576, 346246, 7060, 1; %e A176491 1, 20693, 1804214, 22163246, 70723772, 70723772, 22163246, 1804214, 20693, 1; %e A176491 1, 61082, 9268821, 180504510, 916661604, 1542816966, 916661604, 180504510, 9268821, 61082, 1; %p A176491 A176491 := proc(n,k) %p A176491 A176490(n,k)+binomial(n,k)-1 ; %p A176491 end proc: # _R. J. Mathar_, Jun 16 2015 %t A176491 (*A060187*) %t A176491 p[x_, n_] = (1 - x)^(n + 1)*Sum[(2*k + 1)^n*x^k, {k, 0, Infinity}]; %t A176491 f[n_, m_] := CoefficientList[FullSimplify[ExpandAll[p[x, n]]], x][[m + 1]]; %t A176491 << DiscreteMath`Combinatorica`; %t A176491 t[n_, m_, 0] := Binomial[n, m]; %t A176491 t[n_, m_, 1] := Eulerian[1 + n, m]; %t A176491 t[n_, m_, 2] := f[n, m]; %t A176491 t[n_, m_, q_] := t[n, m, q] = t[n, m, q - 2] + t[n, m, q - 3] - 1; %t A176491 Table[Flatten[Table[Table[t[n, m, q], {m, 0, n}], {n, 0, 10}]], {q, 0, 10}] %Y A176491 Cf. A007318, A008292, A060187, A176487. %K A176491 nonn,tabl,easy %O A176491 0,5 %A A176491 _Roger L. Bagula_, Apr 19 2010