A108984 Inverse binomial transform of A003951.

1, 8, 55, 386, 2701, 18908, 132355, 926486, 6485401, 45397808, 317784655, 2224492586, 15571448101, 109000136708, 763000956955, 5341006698686, 37387046890801, 261709328235608, 1831965297649255, 12823757083544786

Offset: 0

Author

Philippe Deléham, Jul 23 2005

Keywords

• nonn

Formula

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

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

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

Extensions

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