OFFSET
0,1
COMMENTS
See El Gradechi (2013) for precise definition.
LINKS
Robin Visser, Table of n, a(n) for n = 0..10000
Amine M. El Gradechi, The Lie theory of certain modular form and arithmetic identities, The Ramanujan Journal 31.3 (2013): 397-433.
FORMULA
a(n) = (-1)^n*240*binomial(n+5, 5) - 504*binomial(n+3, 3). - Robin Visser, Jul 29 2023
PROG
(Magma) [(-1)^n*240*Binomial(n+5, 5)-504*Binomial(n+3, 3): n in [0..100]]; // Robin Visser, Jul 29 2023
(PARI) a(n) = (-1)^n*240*binomial(n+5, 5)-504*binomial(n+3, 3); \\ Robin Visser, Jul 29 2023
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Feb 08 2020
EXTENSIONS
More terms from Robin Visser, Jul 29 2023
STATUS
approved