A120970 - cp's OEIS frontend

A120970 G.f. A(x) satisfies A(x/A(x)^2) = 1 + x ; thus A(x) = 1 + Series_Reversion(x/A(x)^2).

n	a(n)
0	1
1	1
2	2
3	9
4	60
5	504
6	4946
7	54430
8	655362
9	8496454
10	117311198
11	1711459903
12	26228829200
13	420370445830
14	7021029571856
15	121859518887327
16	2192820745899978
17	40831103986939664
18	785429260324068156
19	15585831041632684997
20	318649154587152781210
21	6704504768568697046504

[1, 1, 2, 9, 60, 504, 4946, 54430, 655362, 8496454, 117311198, 1711459903, 26228829200, 420370445830, 7021029571856, 121859518887327, 2192820745899978, 40831103986939664, 785429260324068156, 15585831041632684997, 318649154587152781210, 6704504768568697046504]

cp's OEIS Frontend

A120970 G.f. A(x) satisfies A(x/A(x)^2) = 1 + x ; thus A(x) = 1 + Series_Reversion(x/A(x)^2).

Table of values

List of values