a(n) = 6*n*a(n-1) + 1 with a(0)=1.

A056547

a(n) = 6*n*a(n-1) + 1 with a(0)=1.

Terms

    a(0) =1a(1) =7a(2) =85a(3) =1531a(4) =36745a(5) =1102351a(6) =39684637a(7) =1666754755a(8) =80004228241

External references