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A213776 Antidiagonal sums of the convolution array A213774. 3
1, 8, 30, 81, 184, 376, 717, 1304, 2294, 3941, 6656, 11104, 18361, 30168, 49342, 80441, 130840, 212472, 344645, 558600, 904886, 1465293, 2372160, 3839616, 6214129, 10056296, 16273182, 26332449, 42608824, 68944696, 111557181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..1000

Index entries for linear recurrences with constant coefficients, signature (4,-5,1,2,-1).

FORMULA

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

G.f.: f(x)/g(x), where f(x) = x*(1 + 4*x + 3*x^2) and g(x) = (1 - x - x^2)*(1 - x)^3.

MATHEMATICA

(See A213774.)

CROSSREFS

Cf. A213774, A213500.

Sequence in context: A002417 A126858 A232772 * A113751 A107233 A098213

Adjacent sequences:  A213773 A213774 A213775 * A213777 A213778 A213779

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 21 2012

STATUS

approved

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Last modified March 18 19:58 EDT 2019. Contains 321293 sequences. (Running on oeis4.)