A024144 a(n) = 12^n - n^4.
1, 11, 128, 1647, 20480, 248207, 2984688, 35829407, 429977600, 5159773791, 61917354224, 743008356047, 8916100427520, 106993205350511, 1283918464510448, 15407021574535743, 184884258894970880
Offset: 0
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..300
- Index entries for linear recurrences with constant coefficients, signature (17,-70,130,-125,61,-12).
Programs
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Magma
[12^n-n^4: n in [0..20]]; // Vincenzo Librandi, Jul 01 2011
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Mathematica
Table[12^n - n^4, {n, 0, 30}] (* Wesley Ivan Hurt, Aug 04 2025 *) -
PARI
a(n)= 12^n-n^4 \\ Charles R Greathouse IV, Jul 01 2011
Formula
a(n) = 17*a(n-1) - 70*a(n-2) + 130*a(n-3) - 125*a(n-4) + 61*a(n-5) - 12*a(n-6). - Wesley Ivan Hurt, Aug 04 2025