Generalized Fibonacci numbers.

Terms

a(0) =1a(1) =1a(2) =11a(3) =120a(4) =122a(5) =1331a(6) =1462a(7) =15960a(8) =17413a(9) =190081a(10) =207503a(11) =2265120a(12) =2472614a(13) =26991251a(14) =29463874a(15) =321630000a(16) =351093865a(17) =3832568641a(18) =4183662515a(19) =45669193800a(20) =49852856306a(21) =544197756851a(22) =594050613166