Continued cotangent recurrence a(n+1) = a(n)^3 + 3*a(n) and a(1) = 6.

A145180

Continued cotangent recurrence a(n+1) = a(n)^3 + 3*a(n) and a(1) = 6.

Terms

    a(0) =6a(1) =234a(2) =12813606

External references