A263841 - cp's OEIS frontend

A263841 Expansion of (1 - 2x - x^2)/(sqrt(1+x)(1-3x)^(3/2)2x) - 1/(2x).

n	a(n)
0	1
1	3
2	9
3	28
4	87
5	271
6	843
7	2619
8	8123
9	25153
10	77763
11	240054
12	740017
13	2278329
14	7006093
15	21520872
16	66039651
17	202462113
18	620164491
19	1898109900
20	5805127269
21	17741909157
22	54188530641
23	165405964227
24	504601360389
25	1538559689751
26	4688812503053
27	14282580916834
28	43486805133903

[1, 3, 9, 28, 87, 271, 843, 2619, 8123, 25153, 77763, 240054, 740017, 2278329, 7006093, 21520872, 66039651, 202462113, 620164491, 1898109900, 5805127269, 17741909157, 54188530641, 165405964227, 504601360389, 1538559689751, 4688812503053, 14282580916834, 43486805133903]

cp's OEIS Frontend

A263841 Expansion of (1 - 2x - x^2)/(sqrt(1+x)(1-3x)^(3/2)2x) - 1/(2x).

Table of values

List of values

cp's OEIS Frontend

A263841 Expansion of (1 - 2*x - x^2)/(sqrt(1+x)*(1-3*x)^(3/2)*2*x) - 1/(2*x).

Table of values

List of values

A263841 Expansion of (1 - 2x - x^2)/(sqrt(1+x)(1-3x)^(3/2)2x) - 1/(2x).