A174192 - cp's OEIS frontend

A174192 Expansion of (1-x+2x^2)/ ((1-x)*(1-2x-x^2)).

n	a(n)
0	1
1	2
2	7
3	18
4	45
5	110
6	267
7	646
8	1561
9	3770
10	9103
11	21978
12	53061
13	128102
14	309267
15	746638
16	1802545
17	4351730
18	10506007
19	25363746
20	61233501
21	147830750
22	356895003
23	861620758
24	2080136521
25	5021893802
26	12123924127

[1, 2, 7, 18, 45, 110, 267, 646, 1561, 3770, 9103, 21978, 53061, 128102, 309267, 746638, 1802545, 4351730, 10506007, 25363746, 61233501, 147830750, 356895003, 861620758, 2080136521, 5021893802, 12123924127]

cp's OEIS Frontend

A174192 Expansion of (1-x+2x^2)/ ((1-x)*(1-2x-x^2)).

Table of values

List of values