A038989 - cp's OEIS frontend

A038989 Expansion of (1 - x^2 - 2x^3) / (1 - 2x - 2x^2 - 2x^3 + x^4).

n	a(n)
0	1
1	2
2	5
3	14
4	41
5	118
6	341
7	986
8	2849
9	8234
10	23797
11	68774
12	198761
13	574430
14	1660133
15	4797874
16	13866113
17	40073810
18	115815461
19	334712894
20	967338217
21	2795659334
22	8079605429
23	23350493066
24	67484177441
25	195032892538
26	563655520661
27	1628994688214
28	4707882025385

[1, 2, 5, 14, 41, 118, 341, 986, 2849, 8234, 23797, 68774, 198761, 574430, 1660133, 4797874, 13866113, 40073810, 115815461, 334712894, 967338217, 2795659334, 8079605429, 23350493066, 67484177441, 195032892538, 563655520661, 1628994688214, 4707882025385]

cp's OEIS Frontend

A038989 Expansion of (1 - x^2 - 2x^3) / (1 - 2x - 2x^2 - 2x^3 + x^4).

Table of values

List of values

cp's OEIS Frontend

A038989 Expansion of (1 - x^2 - 2*x^3) / (1 - 2*x - 2*x^2 - 2*x^3 + x^4).

Table of values

List of values

A038989 Expansion of (1 - x^2 - 2x^3) / (1 - 2x - 2x^2 - 2x^3 + x^4).