A067427 Seventh column of triangle A067425.

1, 10, 280, 7840, 219520, 6146560, 172103680, 4818903040, 134929285120, 3778019983360, 105784559534080, 2961967666954240, 82935094674718720, 2322182650892124160, 65021114224979476480, 1820591198299425341440

Offset: 0

Author

Wolfdieter Lang, Jan 25 2002

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..600
• Index entries for linear recurrences with constant coefficients, signature (28).

Crossrefs

Cf. A067426 (sixth column), A067428 (eighth column), A009972 (powers of 28).

Programs

Magma

[Ceiling(10*(4*7)^(n-1)): n in [0..20]]; // Vincenzo Librandi, Oct 03 2011

Mathematica

LinearRecurrence[{28}, {1, 10}, 20] (* Paolo Xausa, Oct 16 2024 *)

Formula

a(n) = A067425(n+6, 6).

a(n) = 10*(4*7)^(n-1), n >= 1, a(0)=1.

G.f.: (1-18*x)/(1-28*x).