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A198690 9*7^n-1. 1
8, 62, 440, 3086, 21608, 151262, 1058840, 7411886, 51883208, 363182462, 2542277240, 17795940686, 124571584808, 872001093662, 6104007655640, 42728053589486, 299096375126408, 2093674625884862, 14655722381194040, 102590056668358286 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = 7*a(n-1)+6. a(n) = 8*a(n-1)-7*a(n-2), n>1.
G.f. ( 8-2*x ) / ( (7*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011
MATHEMATICA
9*7^Range[0, 30]-1 (* or *) LinearRecurrence[{8, -7}, {8, 62}, 30] (* Harvey P. Dale, Apr 22 2019 *)
PROG
(Magma) [9*7^n-1: n in [0..30]]
CROSSREFS
Sequence in context: A044527 A269607 A296584 * A056054 A167251 A227439
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Oct 29 2011
STATUS
approved

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Last modified March 28 04:05 EDT 2024. Contains 371235 sequences. (Running on oeis4.)