Expansion of e.g.f. cos(5*x)*cos(9*x)/cos(15*x) (even powers only).

A349429

Expansion of e.g.f. cos(5*x)*cos(9*x)/cos(15*x) (even powers only).

Terms

    a(0) =1a(1) =119a(2) =129361a(3) =353851559

External references