A034659 a(n) = (11^n + 1)/2.

1, 6, 61, 666, 7321, 80526, 885781, 9743586, 107179441, 1178973846, 12968712301, 142655835306, 1569214188361, 17261356071966, 189874916791621, 2088624084707826, 22974864931786081, 252723514249646886

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Index entries for linear recurrences with constant coefficients, signature (12,-11).

Formula

a(n) = 11*a(n-1) - 5 (with a(0)=1). - Vincenzo Librandi, Nov 17 2010

G.f.: (1-6*x)/((1-x)*(1-11*x)). - Colin Barker, May 04 2012

Crossrefs

Sequence in context: A160751 A236670 A142970 * A369509 A064088 A342110

Adjacent sequences: A034656 A034657 A034658 * A034660 A034661 A034662

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved