a(n) = (2*n + 1)*(a(n - 1) + 2^n) for n >= 1, a(0) = 1.
A128195
a(n) = (2*n + 1)*(a(n - 1) + 2^n) for n >= 1, a(0) = 1.
Terms
- a(0) =1a(1) =9a(2) =65a(3) =511a(4) =4743a(5) =52525a(6) =683657a(7) =10256775a(8) =174369527a(9) =3313030741a(10) =69573667065
External references
- oeis: A128195