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