Continued cotangent recurrence a(n+1)=a(n)^3+3*a(n) with a(1)=13.

A145187

Continued cotangent recurrence a(n+1)=a(n)^3+3*a(n) with a(1)=13.

Terms

    a(0) =13a(1) =2236a(2) =11179326964

External references