A123222 - cp's OEIS frontend

A123222 Expansion of -x * (x-1) * (3x^2-1) / (9x^4-8x^3+4x-1).

n	a(n)
1	1
2	3
3	9
4	31
5	109
6	391
7	1397
8	4995
9	17833
10	63675
11	227313
12	811543
13	2897269
14	10343647
15	36928061
16	131837979
17	470678161
18	1680380979
19	5999172633
20	21417807055
21	76464283837
22	272987183095
23	974598829637
24	3479441311347
25	12422046335161

[1, 3, 9, 31, 109, 391, 1397, 4995, 17833, 63675, 227313, 811543, 2897269, 10343647, 36928061, 131837979, 470678161, 1680380979, 5999172633, 21417807055, 76464283837, 272987183095, 974598829637, 3479441311347, 12422046335161]

cp's OEIS Frontend

A123222 Expansion of -x * (x-1) * (3x^2-1) / (9x^4-8x^3+4x-1).

Table of values

List of values

cp's OEIS Frontend

A123222 Expansion of -x * (x-1) * (3*x^2-1) / (9*x^4-8*x^3+4*x-1).

Table of values

List of values

A123222 Expansion of -x * (x-1) * (3x^2-1) / (9x^4-8x^3+4x-1).