A052988 - cp's OEIS frontend

A052988 Expansion of (1-x^2)/(1-2x-2x^2+x^3+x^4).

n	a(n)
0	1
1	2
2	5
3	13
4	33
5	85
6	218
7	560
8	1438
9	3693
10	9484
11	24356
12	62549
13	160633
14	412524
15	1059409
16	2720684
17	6987029
18	17943493
19	46080951
20	118341175
21	303913730
22	780485366
23	2004376066
24	5147467959
25	13219288954
26	33948652394
27	87184038671

[1, 2, 5, 13, 33, 85, 218, 560, 1438, 3693, 9484, 24356, 62549, 160633, 412524, 1059409, 2720684, 6987029, 17943493, 46080951, 118341175, 303913730, 780485366, 2004376066, 5147467959, 13219288954, 33948652394, 87184038671]

cp's OEIS Frontend

A052988 Expansion of (1-x^2)/(1-2x-2x^2+x^3+x^4).

Table of values

List of values