A155595 - OEIS

A155595

a(n) = 11^n + 2^n - 1.

1, 12, 124, 1338, 14656, 161082, 1771624, 19487298, 214359136, 2357948202, 25937425624, 285311672658, 3138428380816, 34522712152122, 379749833599624, 4177248169448418, 45949729863637696, 505447028499424842, 5559917313492493624, 61159090448415070578, 672749994932561057776

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OFFSET

0,2

LINKS

Paolo Xausa, Table of n, a(n) for n = 0..950

Index entries for linear recurrences with constant coefficients, signature (14,-35,22).

FORMULA

G.f.: 1/(1-11*x)+1/(1-2*x)-1/(1-x). E.g.f.: e^(11*x)+e^(2*x)-e^x.

a(n) = 13*a(n-1)-22*a(n-2)-10 with a(0)=1, a(1)=12. - Vincenzo Librandi, Jul 21 2010

MATHEMATICA

A155595[n_] := 11^n + 2^n - 1; Array[A155595, 25, 0] (* Paolo Xausa, Mar 04 2026 *)

PROG