A198846 9*6^n-1.

8, 53, 323, 1943, 11663, 69983, 419903, 2519423, 15116543, 90699263, 544195583, 3265173503, 19591041023, 117546246143, 705277476863, 4231664861183, 25389989167103, 152339935002623, 914039610015743, 5484237660094463, 32905425960566783

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (7,-6).

Formula

a(n) = 6*a(n-1)+5. a(n) = 7*a(n-1)-6*a(n-2), n>1.

Prog

(Magma) [9*6^n-1: n in [0..30]]

Crossrefs

Sequence in context: A317426 A212754 A099622 * A291662 A110099 A297334

Adjacent sequences: A198843 A198844 A198845 * A198847 A198848 A198849

Keyword

nonn,easy

Author

Vincenzo Librandi, Oct 31 2011

Status

approved