a(n) = A004001(n)*a(n-1) + a(n-2), for n > 2, with a(1) = a(2) = 1.
A135688
a(n) = A004001(n)*a(n-1) + a(n-2), for n > 2, with a(1) = a(2) = 1.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =24a(5) =103a(6) =436a(7) =1847a(8) =9671a(9) =59873a(10) =428782a(11) =3061347a(12) =24919558a(13) =202417811a(14) =1644262046a(15) =13356514179a(16) =121852889657
External references
- oeis: A135688