a(n) = (2*n - 1)*a(n - 1) + 2^n for n >= 1, a(0) = 1.
A128196
a(n) = (2*n - 1)*a(n - 1) + 2^n for n >= 1, a(0) = 1.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =73a(4) =527a(5) =4775a(6) =52589a(7) =683785a(8) =10257031a(9) =174370039a(10) =3313031765a(11) =69573669113
External references
- oeis: A128196