a(0) = 1, a(1) = 3; for n > 1, a(n) = 6*a(n-1) - a(n-2).
A001541
a(0) = 1, a(1) = 3; for n > 1, a(n) = 6*a(n-1) - a(n-2).
Terms
- a(0) =1a(1) =3a(2) =17a(3) =99a(4) =577a(5) =3363a(6) =19601a(7) =114243a(8) =665857a(9) =3880899a(10) =22619537a(11) =131836323a(12) =768398401a(13) =4478554083a(14) =26102926097a(15) =152139002499a(16) =886731088897
External references
- oeis: A001541