A199553 5*8^n+1.

6, 41, 321, 2561, 20481, 163841, 1310721, 10485761, 83886081, 671088641, 5368709121, 42949672961, 343597383681, 2748779069441, 21990232555521, 175921860444161, 1407374883553281, 11258999068426241, 90071992547409921

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (9,-8).

Formula

a(n) = 8*a(n-1)-7.

a(n) = 9*a(n-1)-8*a(n-2).

G.f.: (6-13*x)/((1-x)*(1-8*x)).

Prog

(Magma) [5*8^n+1: n in [0..30]];

Crossrefs

Sequence in context: A366837 A024078 A095177 * A225031 A307663 A345189

Adjacent sequences: A199550 A199551 A199552 * A199554 A199555 A199556

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 08 2011

Status

approved