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A155665 11^n+8^n-1. 9
1, 18, 184, 1842, 18736, 193818, 2033704, 21584322, 231136096, 2492165418, 27011166424, 293901605202, 3207147853456, 35072467957818, 384147880094344, 4212432541504482, 46231204840282816, 507698828312979018 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
G.f.: 1/(1-11*x)+1/(1-8*x)-1/(1-x). E.g.f.: e^(11*x)+e^(8*x)-e^x.
a(n)=19*a(n-1)-88*a(n-2)-70 with a(0)=1, a(1)=18 - Vincenzo Librandi, Jul 21 2010
a(0)=1, a(1)=18, a(2)=184, a(n)=20*a(n-1)-107*a(n-2)+88*a(n-3) [From Harvey P. Dale, May 18 2011]
MATHEMATICA
Table[11^n+8^n-1, {n, 0, 20}] (* or *) LinearRecurrence[{20, -107, 88}, {1, 18, 184}, 20] (* Harvey P. Dale, May 18 2011 *)
PROG
(PARI) a(n)=11^n+8^n-1 \\ Charles R Greathouse IV, Jun 11 2015
CROSSREFS
Sequence in context: A026091 A178260 A296778 * A036396 A036394 A246059
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Jan 31 2009
STATUS
approved

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Last modified June 24 09:58 EDT 2024. Contains 373674 sequences. (Running on oeis4.)