A369441 - cp's OEIS frontend

A369441 Expansion of (1/x) * Series_Reversion( x / ((1+x)^2 * (1+x^2)^2) ).

n	a(n)
0	1
1	2
2	7
3	30
4	141
5	704
6	3666
7	19686
8	108222
9	606062
10	3445308
11	19829680
12	115323955
13	676659960
14	4000719012
15	23811922678
16	142557391306
17	857894530348
18	5186614665121
19	31487226410770
20	191871141682557
21	1173163962971056
22	7195329233469552
23	44255915928488880

[1, 2, 7, 30, 141, 704, 3666, 19686, 108222, 606062, 3445308, 19829680, 115323955, 676659960, 4000719012, 23811922678, 142557391306, 857894530348, 5186614665121, 31487226410770, 191871141682557, 1173163962971056, 7195329233469552, 44255915928488880]

cp's OEIS Frontend

A369441 Expansion of (1/x) * Series_Reversion( x / ((1+x)^2 * (1+x^2)^2) ).

Table of values

List of values