a(n) = a(n-1) + A000045(n)*a(n-2), a(1) = 1, a(2) = 1.
A135686
a(n) = a(n-1) + A000045(n)*a(n-2), a(1) = 1, a(2) = 1.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =69a(6) =342a(7) =1791a(8) =13419a(9) =111924a(10) =1306215a(11) =17423271a(12) =321771366a(13) =6890344533a(14) =203170877793
External references
- oeis: A135686