A122584 - cp's OEIS frontend

A122584 Expansion of x(1+x)(1-2x)/(1 - 2x - x^2 + 2*x^3 - x^4).

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	4
7	9
8	19
9	41
10	87
11	186
12	396
13	845
14	1801
15	3841
16	8189
17	17462
18	37232
19	79389
20	169275
21	360937
22	769603
23	1640982
24	3498968
25	7460649
26	15907905
27	33919505
28	72324585
29	154213514
30	328820508
31	701124865
32	1494967795
33	3187632953

[1, 1, 1, 1, 2, 4, 9, 19, 41, 87, 186, 396, 845, 1801, 3841, 8189, 17462, 37232, 79389, 169275, 360937, 769603, 1640982, 3498968, 7460649, 15907905, 33919505, 72324585, 154213514, 328820508, 701124865, 1494967795, 3187632953]

cp's OEIS Frontend

A122584 Expansion of x(1+x)(1-2x)/(1 - 2x - x^2 + 2*x^3 - x^4).

Table of values

List of values

cp's OEIS Frontend

A122584 Expansion of x*(1+x)*(1-2*x)/(1 - 2*x - x^2 + 2*x^3 - x^4).

Table of values

List of values

A122584 Expansion of x(1+x)(1-2x)/(1 - 2x - x^2 + 2*x^3 - x^4).