A199567 7*9^n+1.

8, 64, 568, 5104, 45928, 413344, 3720088, 33480784, 301327048, 2711943424, 24407490808, 219667417264, 1977006755368, 17793060798304, 160137547184728, 1441237924662544, 12971141321962888, 116740271897665984, 1050662447078993848

Offset

0,1

Links

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

Index entries for linear recurrences with constant coefficients, signature (10,-9).

Formula

a(n) = 8*A187709(n).

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

a(n) = 10*a(n-1)-9*a(n-2).

G.f.: 8*(1-2*x)/((1-x)*(1-9*x)).

a(n) = (A096046(n)+1)*4. - Martin Ettl, Nov 13 2012

Prog

(Magma) [7*9^n+1: n in [0..30]];
(Maxima) A199567(n):=7*9^n+1$ makelist(A199567(n), n, 0, 30); /* Martin Ettl, Nov 13 2012 */

Crossrefs

Sequence in context: A144317 A344054 A344252 * A213336 A366497 A355214

Adjacent sequences: A199564 A199565 A199566 * A199568 A199569 A199570

Keyword

nonn,easy

Author

Vincenzo Librandi, Nov 08 2011

Status

approved