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A166870 Coefficients of second derivative of polynomial in A056219: n*(n-1)*A056219(n+1) 0
4, 24, 60, 120, 270, 546, 840, 1368, 2250, 3740, 5544, 7956, 11102, 16380, 23520, 33184, 44676, 59850, 79420, 106260, 141834, 189244, 245088, 314400, 401050, 511758, 648648, 824992, 1044000, 1315020, 1635808, 2023296, 2494206, 3077340 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..34.

MATHEMATICA

(*A056219*) a = {1, 2, 2, 4, 5, 6, 9, 13, 15, 19, 25, 34, 42, 51, 61, 78, 98, 122, 146, 175, 209, 253, 307,

374, 444, 524, 617, 729, 858, 1016, 1200, 1414, 1649, 1916, 2223, 2586, 2996, 3475, 4031, 4672, 5385, 6191, 7102, 8148, 9329, 10673, 12201, 13957, 15939, 18172};

CoefficientList[D[Sum[a[[n + 1]]*x^(n), {n, 0, Length[a] - 1}], {x, 2}], x]

Table[(n*(n - 1))*a[[n + 1]], {n, 2, Length[a] - 2}]

CROSSREFS

Cf. A056219

Sequence in context: A157625 A128205 A085250 * A124350 A112611 A212066

Adjacent sequences:  A166867 A166868 A166869 * A166871 A166872 A166873

KEYWORD

nonn,uned

AUTHOR

Roger L. Bagula, Oct 22 2009

STATUS

approved

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Last modified February 17 17:12 EST 2019. Contains 320222 sequences. (Running on oeis4.)