a(n) = 4*n*a(n-1) + 1 with a(0)=1.
A056545
a(n) = 4*n*a(n-1) + 1 with a(0)=1.
Terms
- a(0) =1a(1) =5a(2) =41a(3) =493a(4) =7889a(5) =157781a(6) =3786745a(7) =106028861a(8) =3392923553a(9) =122145247909
External references
- oeis: A056545
A056545
a(n) = 4*n*a(n-1) + 1 with a(0)=1.