A331319 - cp's OEIS frontend

A331319 a(n) = [x^n](x - 2x^3)/(1 - 2x*(x + 1))^2.

n	a(n)
0	0
1	1
2	4
3	14
4	48
5	156
6	496
7	1544
8	4736
9	14352
10	43072
11	128224
12	379136
13	1114560
14	3260160
15	9494656
16	27545600
17	79642880
18	229573632
19	659951104
20	1892478976
21	5414755328
22	15461117952
23	44064835584
24	125371383808
25	356137570304
26	1010187124736
27	2861518086144
28	8095486246912

[0, 1, 4, 14, 48, 156, 496, 1544, 4736, 14352, 43072, 128224, 379136, 1114560, 3260160, 9494656, 27545600, 79642880, 229573632, 659951104, 1892478976, 5414755328, 15461117952, 44064835584, 125371383808, 356137570304, 1010187124736, 2861518086144, 8095486246912]

cp's OEIS Frontend

A331319 a(n) = [x^n](x - 2x^3)/(1 - 2x*(x + 1))^2.

Table of values

List of values

cp's OEIS Frontend

A331319 a(n) = [x^n](x - 2*x^3)/(1 - 2*x*(x + 1))^2.

Table of values

List of values

A331319 a(n) = [x^n](x - 2x^3)/(1 - 2x*(x + 1))^2.