A281811 - cp's OEIS frontend

A281811 Expansion of Sum_{i>=0} x^(2^i) / (1 - Sum_{j>=0} x^(2^j))^2.

n	a(n)
1	1
2	3
3	7
4	16
5	34
6	71
7	143
8	286
9	562
10	1096
11	2114
12	4054
13	7720
14	14631
15	27591
16	51834
17	97018
18	181030
19	336810
20	625062
21	1157288
22	2138200
23	3942858
24	7257830
25	13338024
26	24474978
27	44848232
28	82073852
29	150016328
30	273893503
31	499534495
32	910161570
33	1656786466
34	3013237398
35	5475710770
36	9942780954
37	18040712384
38	32711070838

[1, 3, 7, 16, 34, 71, 143, 286, 562, 1096, 2114, 4054, 7720, 14631, 27591, 51834, 97018, 181030, 336810, 625062, 1157288, 2138200, 3942858, 7257830, 13338024, 24474978, 44848232, 82073852, 150016328, 273893503, 499534495, 910161570, 1656786466, 3013237398, 5475710770, 9942780954, 18040712384, 32711070838]

cp's OEIS Frontend

A281811 Expansion of Sum_{i>=0} x^(2^i) / (1 - Sum_{j>=0} x^(2^j))^2.

Table of values

List of values