A129905 - cp's OEIS frontend

A129905 Expansion of g.f.: (1-x)(1+2x)/((1+x)(1-3x+x^2)).

n	a(n)
0	1
1	3
2	6
3	17
4	43
5	114
6	297
7	779
8	2038
9	5337
10	13971
11	36578
12	95761
13	250707
14	656358
15	1718369
16	4498747
17	11777874
18	30834873
19	80726747
20	211345366
21	553309353
22	1448582691
23	3792438722
24	9928733473
25	25993761699
26	68052551622
27	178163893169

[1, 3, 6, 17, 43, 114, 297, 779, 2038, 5337, 13971, 36578, 95761, 250707, 656358, 1718369, 4498747, 11777874, 30834873, 80726747, 211345366, 553309353, 1448582691, 3792438722, 9928733473, 25993761699, 68052551622, 178163893169]

cp's OEIS Frontend

A129905 Expansion of g.f.: (1-x)(1+2x)/((1+x)(1-3x+x^2)).

Table of values

List of values

cp's OEIS Frontend

A129905 Expansion of g.f.: (1-x)*(1+2*x)/((1+x)*(1-3*x+x^2)).

Table of values

List of values

A129905 Expansion of g.f.: (1-x)(1+2x)/((1+x)(1-3x+x^2)).