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A151675 Row sums of A154685. 1
8, 27, 63, 122, 210, 333, 497, 708, 972, 1295, 1683, 2142, 2678, 3297, 4005, 4808, 5712, 6723, 7847, 9090, 10458, 11957, 13593, 15372, 17300, 19383, 21627, 24038, 26622, 29385, 32333, 35472, 38808, 42347, 46095, 50058, 54242, 58653, 63297 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Index to sequences with linear recurrences with constant coefficients, signature (4,-6,4,-1)

FORMULA

a(n)=n*(2*n^2+5*n+9)/2 = 4*a(n-1)-6*a(n-2)+4*a(n-3)-a(n-4). G.f.: x*(8-5*x+3*x^2)/(x-1)^4. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 31 2009]

CROSSREFS

Sequence in context: A122013 A131620 A141227 * A062686 A093322 A017670

Adjacent sequences:  A151672 A151673 A151674 * A151676 A151677 A151678

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 31 2009

EXTENSIONS

Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 31 2009

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Last modified February 16 11:51 EST 2012. Contains 205908 sequences.