A384672 - cp's OEIS frontend

A384672 Expansion of (1+2x-x^2) / (1-2x-5x^2+2x^3).

n	a(n)
0	1
1	4
2	12
3	42
4	136
5	458
6	1512
7	5042
8	16728
9	55642
10	184840
11	614434
12	2041784
13	6786058
14	22552168
15	74951058
16	249090840
17	827832634
18	2751217352
19	9143416194
20	30387253880
21	100989154026
22	335627745064
23	1115426752498
24	3707013922264
25	12319906116890
26	40944028340104

[1, 4, 12, 42, 136, 458, 1512, 5042, 16728, 55642, 184840, 614434, 2041784, 6786058, 22552168, 74951058, 249090840, 827832634, 2751217352, 9143416194, 30387253880, 100989154026, 335627745064, 1115426752498, 3707013922264, 12319906116890, 40944028340104]

cp's OEIS Frontend

A384672 Expansion of (1+2x-x^2) / (1-2x-5x^2+2x^3).

Table of values

List of values

cp's OEIS Frontend

A384672 Expansion of (1+2*x-x^2) / (1-2*x-5*x^2+2*x^3).

Table of values

List of values

A384672 Expansion of (1+2x-x^2) / (1-2x-5x^2+2x^3).