A382122 - cp's OEIS frontend

A382122 G.f. satisfies Sum_{n>=0} x^n * abs(1/A(x)^n) = C(x), where C(x) = 1 + x*C(x)^2 and abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).

n	a(n)
0	1
1	1
2	3
3	12
4	49
5	202
6	838
7	3486
8	14575
9	60820
10	254406
11	1061438
12	4444802
13	18602018
14	78066384
15	326985608
16	1365996909
17	5697914836
18	23752394338
19	99027785702
20	413203462516
21	1726164299990
22	7219911692522
23	30228722494504
24	126658682953328
25	530772842793396
26	2224199143900798
27	9319843329508200
28	39051457052597480

[1, 1, 3, 12, 49, 202, 838, 3486, 14575, 60820, 254406, 1061438, 4444802, 18602018, 78066384, 326985608, 1365996909, 5697914836, 23752394338, 99027785702, 413203462516, 1726164299990, 7219911692522, 30228722494504, 126658682953328, 530772842793396, 2224199143900798, 9319843329508200, 39051457052597480]

cp's OEIS Frontend

A382122 G.f. satisfies Sum_{n>=0} x^n * abs(1/A(x)^n) = C(x), where C(x) = 1 + x*C(x)^2 and abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).

Table of values

List of values