Continued cotangent recurrence a(n+1)=a(n)^3+3*a(n) and a(1)=12.

A145186

Continued cotangent recurrence a(n+1)=a(n)^3+3*a(n) and a(1)=12.

Terms

    a(0) =12a(1) =1764a(2) =5489037036

External references