A193578 (13^n+1)/2.

1, 7, 85, 1099, 14281, 185647, 2413405, 31374259, 407865361, 5302249687, 68929245925, 896080197019, 11649042561241, 151437553296127, 1968688192849645, 25592946507045379, 332708304591589921, 4325207959690668967, 56227703475978696565, 730960145187723055339

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..900

Index entries for linear recurrences with constant coefficients, signature (14,-13).

Formula

a(n) = 13*a(n-1)-6, a(0)=1

Prog

(Magma) [(13^n+1)/2: n in [0..20]]
(PARI) a(n)=(13^n+1)/2 \\ Charles R Greathouse IV, Dec 27 2011

Crossrefs

Cf. A141012.

Sequence in context: A155459 A155631 A126344 * A309187 A026001 A371363

Adjacent sequences: A193575 A193576 A193577 * A193579 A193580 A193581

Keyword

nonn,easy

Author

Vincenzo Librandi, Sep 17 2011

Status

approved