A122871 - cp's OEIS frontend

A122871 Expansion of (1 - 2x - sqrt(1 - 4x - 8x^2))/(6x^2).

n	a(n)
0	1
1	2
2	7
3	26
4	106
5	452
6	1999
7	9074
8	42046
9	198044
10	945430
11	4564100
12	22243060
13	109285256
14	540738943
15	2692103714
16	13475973238
17	67784600108
18	342439638418
19	1736727343436
20	8839203054604
21	45132514680248
22	231121351433158

[1, 2, 7, 26, 106, 452, 1999, 9074, 42046, 198044, 945430, 4564100, 22243060, 109285256, 540738943, 2692103714, 13475973238, 67784600108, 342439638418, 1736727343436, 8839203054604, 45132514680248, 231121351433158]

cp's OEIS Frontend

A122871 Expansion of (1 - 2x - sqrt(1 - 4x - 8x^2))/(6x^2).

Table of values

List of values

cp's OEIS Frontend

A122871 Expansion of (1 - 2*x - sqrt(1 - 4*x - 8*x^2))/(6*x^2).

Table of values

List of values

A122871 Expansion of (1 - 2x - sqrt(1 - 4x - 8x^2))/(6x^2).