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 A113607 An extended triangle of Eulerian coefficients A123125: f(x,n)=x^(n+1)+1+A123125(x,n). 0
 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 11, 11, 1, 1, 1, 1, 26, 66, 26, 1, 1, 1, 1, 57, 302, 302, 57, 1, 1, 1, 1, 120, 1191, 2416, 1191, 120, 1, 1, 1, 1, 247, 4293, 15619, 15619, 4293, 247, 1, 1, 1, 1, 502, 14608, 88234, 156190, 88234, 14608, 502, 1, 1, 1, 1, 1013 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Not entirely symmetrical, the x^(n+1)+1 polynomials was added to remove zeros and make the triangle more symmetrical. Row sums are: {1, 3, 3, 4, 8, 26, 122, 722, 5042, 40322, 362882, 3628802}. LINKS Table of n, a(n) for n=1..69. FORMULA f(x,n)=x^(n+1)+1+A123125(x,n). MATHEMATICA lear[f, x, n, a] f[x_, n_] := f[x, n] = x^(n + 1) + (1 - x)^(n + 1)*Sum[k^n*x^k, {k, 0, Infinity}] + 1; Table[FullSimplify[ExpandAll[f[x, n]]], {n, 0, 10}]; a = Join[{{1}}, Table[CoefficientList[FullSimplify[ExpandAll[f[x, n]]], x], {n, 0, 10}]]; Flatten[a] CROSSREFS Cf. A123125. Sequence in context: A300362 A248145 A171398 * A351352 A082586 A160094 Adjacent sequences: A113604 A113605 A113606 * A113608 A113609 A113610 KEYWORD nonn,tabl AUTHOR Roger L. Bagula and Gary W. Adamson, Aug 25 2008 STATUS approved

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Last modified February 23 17:43 EST 2024. Contains 370283 sequences. (Running on oeis4.)