A217778 - cp's OEIS frontend

A217778 Expansion of (1-x)^2(1-3x)/((1-3x+x^2)(1-5x+5x^2)).

n	a(n)
0	1
1	3
2	10
3	34
4	117
5	407
6	1429
7	5055
8	17986
9	64278
10	230473
11	828391
12	2982825
13	10754459
14	38811802
15	140165322
16	506449789
17	1830590295
18	6618524221
19	23933966743
20	86562282258
21	313102489406
22	1132598701585
23	4097213146599
24	14822370816337
25	53623952036787

[1, 3, 10, 34, 117, 407, 1429, 5055, 17986, 64278, 230473, 828391, 2982825, 10754459, 38811802, 140165322, 506449789, 1830590295, 6618524221, 23933966743, 86562282258, 313102489406, 1132598701585, 4097213146599, 14822370816337, 53623952036787]

cp's OEIS Frontend

A217778 Expansion of (1-x)^2(1-3x)/((1-3x+x^2)(1-5x+5x^2)).

Table of values

List of values

cp's OEIS Frontend

A217778 Expansion of (1-x)^2*(1-3*x)/((1-3*x+x^2)*(1-5*x+5*x^2)).

Table of values

List of values

A217778 Expansion of (1-x)^2(1-3x)/((1-3x+x^2)(1-5x+5x^2)).