A067421 Sixth column of triangle A067417.

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

Offset: 0

Author

Wolfdieter Lang, Jan 25 2002

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..800
• Index entries for linear recurrences with constant coefficients, signature (18).

Crossrefs

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

Programs

Magma

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

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).