A323847 - OEIS

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A323847

a(n) = (n-1)*(n-2)*(n^2+9*n+12)/24.

1, 0, 0, 4, 16, 41, 85, 155, 259, 406, 606, 870, 1210, 1639, 2171, 2821, 3605, 4540, 5644, 6936, 8436, 10165, 12145, 14399, 16951, 19826, 23050, 26650, 30654, 35091, 39991, 45385, 51305, 57784, 64856, 72556, 80920, 89985, 99789, 110371, 121771, 134030, 147190

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OFFSET

0,4

COMMENTS

Row 2 of array in A323846.

LINKS

Paolo Xausa, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

FORMULA

G.f.: (x^4-6*x^3+10*x^2-5*x+1)/(1-x)^5. - Alois P. Heinz and Don Knuth, Feb 06 2019

MATHEMATICA

A323847[n_]:=(n-1)(n-2)(n^2+9n+12)/24; Array[A323847, 100, 0] (* or *)