OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (4,-2,-4,-1).
FORMULA
MAPLE
PROG
(PARI) a(n) = ((1 - quadgen(8))^n + (1 + quadgen(8))^n)*n/2; \\ Michel Marcus, Jul 31 2023
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Peter Luschny, Jul 30 2023
STATUS
approved