a(0) = 0, a(1) = 4, then a(n) = 18*a(n-1) - a(n-2).
A060645
a(0) = 0, a(1) = 4, then a(n) = 18*a(n-1) - a(n-2).
Terms
- a(0) =0a(1) =4a(2) =72a(3) =1292a(4) =23184a(5) =416020a(6) =7465176a(7) =133957148a(8) =2403763488a(9) =43133785636a(10) =774004377960
External references
- oeis: A060645