Denominators of coefficients in expansion of 1/(1 + 2 cos(sqrt(x))).
A279121
Denominators of coefficients in expansion of 1/(1 + 2 cos(sqrt(x))).
Terms
- a(0) =3a(1) =9a(2) =36a(3) =1080a(4) =544320a(5) =5443200a(6) =102643200a(7) =392302310400
External references
- oeis: A279121