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A155459
a(n) = 7*a(n-1)+36*a(n-2), n>2 ; a(0)=1, a(1)=1, a(2)=7 .
0
1, 1, 7, 85, 847, 8989, 93415, 977509, 10205503, 106628845, 1113800023, 11635238581, 121543470895, 1269672885181, 13263275148487, 138551149905925, 1447335954687007, 15119193079422349, 157938445924688695
OFFSET
0,3
FORMULA
G.f.: (1-6*x-36*x^2)/(1-7*x-36*x^2).
MATHEMATICA
LinearRecurrence[{7, 36}, {1, 1, 7}, 25] (* Paolo Xausa, Jan 29 2024 *)
CROSSREFS
Sequence in context: A329108 A162160 A027531 * A155631 A126344 A193578
KEYWORD
nonn,easy
AUTHOR
Philippe Deléham, Jan 22 2009
STATUS
approved