A308031 - cp's OEIS frontend

A308031 G.f. A(x) satisfies: A(x) = x + x^2 + x^3 + x^4 * (1 + A(A(x))).

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	4
8	8
9	16
10	34
11	78
12	195
13	523
14	1472
15	4284
16	12832
17	39608
18	126406
19	418276
20	1436230
21	5110170
22	18785417
23	71109917
24	276404921
25	1101234823
26	4493335194
27	18773200580
28	80320474041
29	351906635253
30	1578344960050
31	7241981076424
32	33961826526634
33	162615016927284

[1, 1, 1, 1, 1, 2, 4, 8, 16, 34, 78, 195, 523, 1472, 4284, 12832, 39608, 126406, 418276, 1436230, 5110170, 18785417, 71109917, 276404921, 1101234823, 4493335194, 18773200580, 80320474041, 351906635253, 1578344960050, 7241981076424, 33961826526634, 162615016927284]

cp's OEIS Frontend

A308031 G.f. A(x) satisfies: A(x) = x + x^2 + x^3 + x^4 * (1 + A(A(x))).

Table of values

List of values