OFFSET
1,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,7,-1).
FORMULA
PROG
(PARI) a(n) = sum(k=0, n\5, binomial(n+k, n-2-5*k));
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Jun 24 2024
STATUS
approved