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A155649
a(n) = 11^n+6^n-1^n.
20
1, 16, 156, 1546, 15936, 168826, 1818216, 19767106, 216038496, 2368025386, 25997890776, 285674467666, 3140605159056, 34535772837946, 379828197747336, 4177718354400226, 45952550973479616, 505463955158738506
OFFSET
0,2
FORMULA
G.f.: 1/(1-11*x)+1/(1-6*x)-1/(1-x).
E.g.f.: e^(11*x)+e^(6*x)-e^x.
a(n) = 17*a(n-1)-66*a(n-2)-50 with a(0)=1, a(1)=16 - Vincenzo Librandi, Jul 21 2010
MAPLE
A155649:=n->11^n+6^n-1: seq(A155649(n), n=0..30); # Wesley Ivan Hurt, Apr 24 2017
PROG
(PARI) a(n)=11^n+6^n-1 \\ Charles R Greathouse IV, Jun 11 2015
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Jan 31 2009
STATUS
approved