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A083302
a(n) = (4*9^n + (-1)^n)/5.
2
1, 7, 65, 583, 5249, 47239, 425153, 3826375, 34437377, 309936391, 2789427521, 25104847687, 225943629185, 2033492662663, 18301433963969, 164712905675719, 1482416151081473, 13341745359733255, 120075708237599297
OFFSET
0,2
COMMENTS
Binomial transform of A083301.
FORMULA
G.f.: (1-x)/((1-*9x)(1+x)).
E.g.f.: (4*exp(9*x) + exp(-x))/5.
PROG
(Magma) [(4*9^n+(-1)^n)/5: n in [0..25]]; // Vincenzo Librandi, Jun 29 2011
(PARI) a(n)=4*9^n\/5 \\ Charles R Greathouse IV, Jun 29 2011
CROSSREFS
Sequence in context: A253802 A220597 A264875 * A099342 A051550 A371393
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Apr 24 2003
STATUS
approved