A217782 - cp's OEIS frontend

A217782 Expansion of (1-x)(1-2x)(1-3x)/((1-5x+5x^2)(1-3x+x^2)).

n	a(n)
0	1
1	2
2	6
3	20
4	69
5	242
6	857
7	3054
8	10930
9	39236
10	141153
11	508598
12	1834641
13	6623450
14	23926334
15	86468052
16	312587197
17	1130277914
18	4087621545
19	14784539846
20	53478888618
21	193456813508
22	699850536281
23	2531866279710
24	9159810802849
25	33139021206962
26	119894215708662

[1, 2, 6, 20, 69, 242, 857, 3054, 10930, 39236, 141153, 508598, 1834641, 6623450, 23926334, 86468052, 312587197, 1130277914, 4087621545, 14784539846, 53478888618, 193456813508, 699850536281, 2531866279710, 9159810802849, 33139021206962, 119894215708662]

cp's OEIS Frontend

A217782 Expansion of (1-x)(1-2x)(1-3x)/((1-5x+5x^2)(1-3x+x^2)).

Table of values

List of values

cp's OEIS Frontend

A217782 Expansion of (1-x)*(1-2x)*(1-3x)/((1-5x+5*x^2)*(1-3x+x^2)).

Table of values

List of values

A217782 Expansion of (1-x)(1-2x)(1-3x)/((1-5x+5x^2)(1-3x+x^2)).