OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..700
Index entries for linear recurrences with constant coefficients, signature (8,-24,32,-16).
FORMULA
a(n) = 2^(n-3) * (-12*n + 9*n^2 - n^3).
G.f.: -x*(1 - 10*x + 22*x^2)/(1 - 2*x)^4. - Andrew Howroyd, Nov 13 2025
MATHEMATICA
Table[2^(n-3)*(-12*n+9*n^2-n^3), {n, 0, 30}] (* Vincenzo Librandi, May 02 2025 *)
PROG
(PARI) a(n) = 2^(n-3)*(-12*n+9*n^2-n^3);
(Magma) [2^(n-3) * (-12*n+9*n^2-n^3): n in [0..30]]; // Vincenzo Librandi, May 02 2025
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Seiichi Manyama, Apr 18 2025
STATUS
approved
