A086246 - cp's OEIS frontend

A086246 Expansion of (1 + x - sqrt(1 - 2x - 3x^2)) / 2 in powers of x.

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	4
6	9
7	21
8	51
9	127
10	323
11	835
12	2188
13	5798
14	15511
15	41835
16	113634
17	310572
18	853467
19	2356779
20	6536382
21	18199284
22	50852019
23	142547559
24	400763223
25	1129760415
26	3192727797
27	9043402501
28	25669818476
29	73007772802
30	208023278209
31	593742784829
32	1697385471211
33	4859761676391
34	13933569346707

[0, 1, 1, 1, 2, 4, 9, 21, 51, 127, 323, 835, 2188, 5798, 15511, 41835, 113634, 310572, 853467, 2356779, 6536382, 18199284, 50852019, 142547559, 400763223, 1129760415, 3192727797, 9043402501, 25669818476, 73007772802, 208023278209, 593742784829, 1697385471211, 4859761676391, 13933569346707]

cp's OEIS Frontend

A086246 Expansion of (1 + x - sqrt(1 - 2x - 3x^2)) / 2 in powers of x.

Table of values

List of values

cp's OEIS Frontend

A086246 Expansion of (1 + x - sqrt(1 - 2*x - 3*x^2)) / 2 in powers of x.

Table of values

List of values

A086246 Expansion of (1 + x - sqrt(1 - 2x - 3x^2)) / 2 in powers of x.