A084860 - cp's OEIS frontend

A084860 Expansion of (1 - 2x + 2x^2 - x^3)/(1 - 2x)^2.

n	a(n)
0	1
1	2
2	6
3	15
4	36
5	84
6	192
7	432
8	960
9	2112
10	4608
11	9984
12	21504
13	46080
14	98304
15	208896
16	442368
17	933888
18	1966080
19	4128768
20	8650752
21	18087936
22	37748736
23	78643200
24	163577856
25	339738624
26	704643072
27	1459617792
28	3019898880
29	6241124352

[1, 2, 6, 15, 36, 84, 192, 432, 960, 2112, 4608, 9984, 21504, 46080, 98304, 208896, 442368, 933888, 1966080, 4128768, 8650752, 18087936, 37748736, 78643200, 163577856, 339738624, 704643072, 1459617792, 3019898880, 6241124352]

cp's OEIS Frontend

A084860 Expansion of (1 - 2x + 2x^2 - x^3)/(1 - 2x)^2.

Table of values

List of values