OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (7,-15,20,-15,6,-1).
FORMULA
PROG
(PARI) a(n) = sum(k=0, n, binomial(n+1+5*k, n-1-k));
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Jun 23 2024
STATUS
approved