A087223 - cp's OEIS frontend

A087223 G.f. satisfies A(x) = f(x) + xA(x)f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).

n	a(n)
0	1
1	2
2	5
3	14
4	36
5	96
6	254
7	676
8	1792
9	4756
10	12621
11	33490
12	88868
13	235818
14	625764
15	1660510
16	4406296
17	11692452
18	31026836
19	82332140
20	218474784
21	579739960
22	1538385398
23	4082226194
24	10832507040
25	28744906148
26	76276860598
27	202406625820

[1, 2, 5, 14, 36, 96, 254, 676, 1792, 4756, 12621, 33490, 88868, 235818, 625764, 1660510, 4406296, 11692452, 31026836, 82332140, 218474784, 579739960, 1538385398, 4082226194, 10832507040, 28744906148, 76276860598, 202406625820]

cp's OEIS Frontend

A087223 G.f. satisfies A(x) = f(x) + xA(x)f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).

Table of values

List of values

cp's OEIS Frontend

A087223 G.f. satisfies A(x) = f(x) + x*A(x)*f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).

Table of values

List of values

A087223 G.f. satisfies A(x) = f(x) + xA(x)f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).