A305561 - cp's OEIS frontend

A305561 Expansion of 2x(1 - 2x)/(1 + 2x - 8x^2 - sqrt(1 - 4x^2)).

n	a(n)
0	1
1	1
2	3
3	8
4	23
5	64
6	182
7	512
8	1451
9	4096
10	11594
11	32768
12	92710
13	262144
14	741548
15	2097152
16	5931955
17	16777216
18	47454210
19	134217728
20	379628818
21	1073741824
22	3037013748
23	8589934592
24	24296051198
25	68719476736
26	194368201572
27	549755813888
28	1554944869676
29	4398046511104

[1, 1, 3, 8, 23, 64, 182, 512, 1451, 4096, 11594, 32768, 92710, 262144, 741548, 2097152, 5931955, 16777216, 47454210, 134217728, 379628818, 1073741824, 3037013748, 8589934592, 24296051198, 68719476736, 194368201572, 549755813888, 1554944869676, 4398046511104]

cp's OEIS Frontend

A305561 Expansion of 2x(1 - 2x)/(1 + 2x - 8x^2 - sqrt(1 - 4x^2)).

Table of values

List of values

cp's OEIS Frontend

A305561 Expansion of 2*x*(1 - 2*x)/(1 + 2*x - 8*x^2 - sqrt(1 - 4*x^2)).

Table of values

List of values

A305561 Expansion of 2x(1 - 2x)/(1 + 2x - 8x^2 - sqrt(1 - 4x^2)).