A067421 Sixth column of triangle A067417.

1, 8, 144, 2592, 46656, 839808, 15116544, 272097792, 4897760256, 88159684608, 1586874322944, 28563737812992, 514147280633856, 9254651051409408, 166583718925369344, 2998506940656648192

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..800

Index entries for linear recurrences with constant coefficients, signature (18).

Formula

a(n) = A067417(n+5, 5).

a(n) = 8*(3*6)^(n-1), n >= 1, a(0)=1.

G.f.: (1-10*x)/(1-18*x).

Prog

(Magma) [Ceiling(8*(3*6)^(n-1)): n in [0..20]]; // Vincenzo Librandi, Oct 02 2011

Crossrefs

Cf. A067420 (fifth column), A067422 (seventh column), A001027 (powers of 18).

Sequence in context: A065409 A061899 A134492 * A124059 A275867 A052764

Adjacent sequences: A067418 A067419 A067420 * A067422 A067423 A067424

Keyword

nonn,easy

Author

Wolfdieter Lang, Jan 25 2002

Status

approved