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A108984 Inverse binomial transform of A003951. 0
1, 8, 55, 386, 2701, 18908, 132355, 926486, 6485401, 45397808, 317784655, 2224492586, 15571448101, 109000136708, 763000956955, 5341006698686, 37387046890801, 261709328235608, 1831965297649255, 12823757083544786 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

FORMULA

a(n) = 6a(n-1) + 7a(n-2), a(0) = 1, a(1) = 8.

a(2n) = 7a(2n-1) - 1; a(2n+1) = 7a(2n) + 1.

O.g.f.: -(1+2x)/[(1+x)(7x-1)]. - R. J. Mathar, Apr 02 2008

a(n)=-(1/8)*[(-1)^n-9*7^n], with n>=0 [From Paolo P. Lava, Nov 19 2008]

CROSSREFS

Sequence in context: A010924 A010918 A019484 * A264342 A230963 A209114

Adjacent sequences:  A108981 A108982 A108983 * A108985 A108986 A108987

KEYWORD

nonn

AUTHOR

Philippe Deléham, Jul 23 20050

EXTENSIONS

More terms from R. J. Mathar, Apr 02 2008

STATUS

approved

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Last modified May 19 10:55 EDT 2019. Contains 323390 sequences. (Running on oeis4.)