A242575 - cp's OEIS frontend

A242575 a(n) = [x^n] G(n+1,x) where G(n,x) is the n-th iteration of G(1,x) = x/(1-x+x^2), so that G(n+1,x) = G(n, G(1,x)) with G(0,x)=x.

n	a(n)
1	1
2	3
3	12
4	65
5	464
6	4235
7	48000
8	658197
9	10676571
10	200994145
11	4321369524
12	104676808756
13	2824120458186
14	84038944594677
15	2735391623889696
16	96690702098948611
17	3688764754855986702
18	151064345601782722492
19	6609564176073032406148
20	307682727619722793499662

[1, 3, 12, 65, 464, 4235, 48000, 658197, 10676571, 200994145, 4321369524, 104676808756, 2824120458186, 84038944594677, 2735391623889696, 96690702098948611, 3688764754855986702, 151064345601782722492, 6609564176073032406148, 307682727619722793499662]

cp's OEIS Frontend

A242575 a(n) = [x^n] G(n+1,x) where G(n,x) is the n-th iteration of G(1,x) = x/(1-x+x^2), so that G(n+1,x) = G(n, G(1,x)) with G(0,x)=x.

Table of values

List of values