A189427 - cp's OEIS frontend

A189427 Expansion of (x^2)/((1-x)(1-2x-x^2+x^3)^2).

n	a(n)
0	0
1	0
2	1
3	5
4	19
5	61
6	180
7	502
8	1349
9	3529
10	9050
11	22854
12	57014
13	140832
14	345036
15	839530
16	2030757
17	4887423
18	11710757
19	27951471
20	66486128
21	157661282
22	372840407
23	879510801
24	2070045268
25	4862121660
26	11398688956
27	26676792832
28	62333380456
29	145434747140

[0, 0, 1, 5, 19, 61, 180, 502, 1349, 3529, 9050, 22854, 57014, 140832, 345036, 839530, 2030757, 4887423, 11710757, 27951471, 66486128, 157661282, 372840407, 879510801, 2070045268, 4862121660, 11398688956, 26676792832, 62333380456, 145434747140]

cp's OEIS Frontend

A189427 Expansion of (x^2)/((1-x)(1-2x-x^2+x^3)^2).

Table of values

List of values

cp's OEIS Frontend

A189427 Expansion of (x^2)/((1-x)*(1-2*x-x^2+x^3)^2).

Table of values

List of values

A189427 Expansion of (x^2)/((1-x)(1-2x-x^2+x^3)^2).