A087944 - cp's OEIS frontend

A087944 Expansion of (1-4x+3x^2)/((1-2x)(1-4*x+x^2)).

n	a(n)
0	1
1	2
2	6
3	20
4	70
5	252
6	922
7	3404
8	12630
9	46988
10	175066
11	652764
12	2434966
13	9085052
14	33901146
15	126511340
16	472127830
17	1761967212
18	6575675482
19	24540603644
20	91586476950
21	341804779868
22	1275631593946
23	4760719498764
24	17767242206806

[1, 2, 6, 20, 70, 252, 922, 3404, 12630, 46988, 175066, 652764, 2434966, 9085052, 33901146, 126511340, 472127830, 1761967212, 6575675482, 24540603644, 91586476950, 341804779868, 1275631593946, 4760719498764, 17767242206806]

cp's OEIS Frontend

A087944 Expansion of (1-4x+3x^2)/((1-2x)(1-4*x+x^2)).

Table of values

List of values

cp's OEIS Frontend

A087944 Expansion of (1-4*x+3*x^2)/((1-2*x)*(1-4*x+x^2)).

Table of values

List of values

A087944 Expansion of (1-4x+3x^2)/((1-2x)(1-4*x+x^2)).