OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (15,-85,225,-274,120).
FORMULA
a(n) = Sum_{i=1..n} i!*i^4*Stirling2(n, i)*(-1)^(n-i).
MATHEMATICA
Table[24*5^n - 60*4^n + 50*3^n - 15*2^n + 1, {n, 0, 25}]
PROG
(PARI) a(n) = sum(i=1, n, i!*i^4*stirling(n, i, 2)*(-1)^(n-i)); \\ Michel Marcus, Oct 21 2022
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mario Catalani (mario.catalani(AT)unito.it), Jan 03 2004
EXTENSIONS
More terms from Michel Marcus, Oct 21 2022
STATUS
approved