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A108984
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Inverse binomial transform of A003951.
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0
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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; internal format)
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OFFSET
| 0,2
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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 (mathar(AT)strw.leidenuniv.nl), Apr 02 2008
a(n)=-(1/8)*[(-1)^n-9*7^n], with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 19 2008]
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CROSSREFS
| Sequence in context: A010924 A010918 A019484 * A160429 A003722 A044146
Adjacent sequences: A108981 A108982 A108983 * A108985 A108986 A108987
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KEYWORD
| nonn
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AUTHOR
| Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Jul 23 20050
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 02 2008
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