A024053 a(n) = 5^n - n^4.

1, 4, 9, 44, 369, 2500, 14329, 75724, 386529, 1946564, 9755625, 48813484, 244119889, 1220674564, 6103477209, 30517527500, 152587825089, 762939369604, 3814697160649, 19073486197804, 95367431480625

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..300

Index entries for linear recurrences with constant coefficients, signature (10,-35,60,-55,26,-5).

Formula

a(n) = 10*a(n-1) - 35*a(n-2) + 60*a(n-3) - 55*a(n-4) + 26*a(n-5) - 5*a(n-6).

Prog

(Magma) [5^n-n^4: n in [0..35]]; // Vincenzo Librandi, Jun 12 2011

Crossrefs

Sequence in context: A209079 A149170 A357447 * A197970 A048892 A108849

Adjacent sequences: A024050 A024051 A024052 * A024054 A024055 A024056

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved