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A213436 Principal diagonal of the convolution array A212891. 2
1, 17, 84, 260, 625, 1281, 2352, 3984, 6345, 9625, 14036, 19812, 27209, 36505, 48000, 62016, 78897, 99009, 122740, 150500, 182721, 219857, 262384, 310800, 365625, 427401, 496692, 574084, 660185, 755625, 861056, 977152, 1104609 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..33.

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

FORMULA

a(n) = (11*n^4 + 6*n^3 - 5*n^2)/12.

a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5).

G.f.: x*(1 + 12*x + 9*x^2)/(1 - x)^5.

MATHEMATICA

(See A212891.)

CROSSREFS

Cf. A212891, A213500.

Sequence in context: A193046 A158528 A197346 * A239667 A156968 A212487

Adjacent sequences:  A213433 A213434 A213435 * A213437 A213438 A213439

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 16 2012

STATUS

approved

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Last modified June 19 17:16 EDT 2019. Contains 324222 sequences. (Running on oeis4.)