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Search: id:A048467
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A048467 a(n)=T(6,n), array T given by A047858. +0
1
1, 8, 23, 55, 123, 267, 571, 1211, 2555, 5371, 11259, 23547, 49147, 102395, 212987, 442363, 917499, 1900539, 3932155, 8126459, 16777211, 34603003, 71303163, 146800635, 301989883, 620756987, 1275068411, 2617245691 (list; graph; listen)
OFFSET

0,2

FORMULA

G.f.: (-9x^2+3x+1)/[(1-x)(1-2x)^2].

CROSSREFS

n-th difference of a(n), a(n-1), ..., a(0) is (7, 8, 9, ...).

Sequence in context: A139433 A033951 A027054 this_sequence A002765 A048770 A055273

Adjacent sequences: A048464 A048465 A048466 this_sequence A048468 A048469 A048470

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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