A013887 a(n) = 18^(5*n + 2).

324, 612220032, 1156831381426176, 2185911559738696531968, 4130428534112329328517709824, 7804725584345565904628551916716032, 14747559712960682275277163588165279154176, 27866516911699690485530919446962290200798035968, 52655678627806560751363688397557640770141543227981824

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..50

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (1889568).

Formula

a(n) = 1889568*a(n-1), a(0)=324. - Vincenzo Librandi, May 27 2011

Mathematica

18^(5*Range[0, 10] + 2) (* Paolo Xausa, May 30 2026 *)

Prog

(Magma) [18^(5*n+2): n in [0..10]]; // Vincenzo Librandi, May 27 2011
(PARI) a(n)=18^(5*n+2) \\ Charles R Greathouse IV, May 31 2026

Crossrefs

Cf. A001027.

Sequence in context: A132644 A202635 A013763 * A172198 A343080 A159976

Adjacent sequences: A013884 A013885 A013886 * A013888 A013889 A013890

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved