A024066 a(n) = 6^n - n^4.

1, 5, 20, 135, 1040, 7151, 45360, 277535, 1675520, 10071135, 60456176, 362782415, 2176761600, 13060665455, 78364125680, 470184933951, 2821109841920, 16926659361215, 101559956563440, 609359739880175

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..500

Index entries for linear recurrences with constant coefficients, signature (11, -40, 70, -65, 31, -6).

Mathematica

Table[6^n-n^4, {n, 0, 30}] (* or *) LinearRecurrence[{11, -40, 70, -65, 31, -6}, {1, 5, 20, 135, 1040, 7151}, 30] (* Harvey P. Dale, Apr 09 2018 *)

Prog

(Magma) [6^n-n^4: n in [0..25]]; // Vincenzo Librandi, Jul 03 2011

Crossrefs

Sequence in context: A081067 A318250 A337292 * A009569 A061964 A133667

Adjacent sequences: A024063 A024064 A024065 * A024067 A024068 A024069

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved