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A323847 a(n) = (n-1)*(n-2)*(n^2+9*n+12)/24. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Row 2 of array in A323846.

LINKS

Table of n, a(n) for n=0..42.

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

CROSSREFS

Cf. A323846.

Sequence in context: A206918 A056373 A018828 * A114211 A188124 A190090

Adjacent sequences:  A323842 A323843 A323846 * A323848 A323849 A323850

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Feb 06 2019

EXTENSIONS

More terms from Alois P. Heinz, Feb 06 2019

Edited with new offset by N. J. A. Sloane, Feb 07 2019 following a suggestion from Don Knuth.

STATUS

approved

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Last modified April 20 08:29 EDT 2019. Contains 322306 sequences. (Running on oeis4.)