A345245 - cp's OEIS frontend

A345245 G.f. A(x) satisfies: A(x) = x + x^2 * exp(4 * Sum_{k>=1} (-1)^(k+1) * A(x^k) / k).

n	a(n)
1	1
2	1
3	4
4	10
5	36
6	135
7	504
8	2000
9	8072
10	33099
11	138132
12	582930
13	2485412
14	10692219
15	46340984
16	202175344
17	887175352
18	3913032212
19	17338327848
20	77141235796
21	344491008296
22	1543591834950
23	6937783312048
24	31270131096820
25	141305878384704
26	640065923118435
27	2905664234243052
28	13217615913137250

[1, 1, 4, 10, 36, 135, 504, 2000, 8072, 33099, 138132, 582930, 2485412, 10692219, 46340984, 202175344, 887175352, 3913032212, 17338327848, 77141235796, 344491008296, 1543591834950, 6937783312048, 31270131096820, 141305878384704, 640065923118435, 2905664234243052, 13217615913137250]

cp's OEIS Frontend

A345245 G.f. A(x) satisfies: A(x) = x + x^2 * exp(4 * Sum_{k>=1} (-1)^(k+1) * A(x^k) / k).

Table of values

List of values