Numerators of coefficients in function a(x) such that a(a(a(x))) = sin x.

A052132

Numerators of coefficients in function a(x) such that a(a(a(x))) = sin x.

Terms

    a(0) =1a(1) =-1a(2) =-7a(3) =-643a(4) =-13583a(5) =-29957a(6) =-24277937a(7) =-6382646731

External references