A030435 - cp's OEIS frontend

A030435 Expansion of g.f. (1 + x - 2x^2 - x^3)/(1/2 - 2x^2 + x^4).

n	a(n)
0	2
1	2
2	4
3	6
4	12
5	20
6	40
7	68
8	136
9	232
10	464
11	792
12	1584
13	2704
14	5408
15	9232
16	18464
17	31520
18	63040
19	107616
20	215232
21	367424
22	734848
23	1254464
24	2508928
25	4283008
26	8566016
27	14623104
28	29246208
29	49926400
30	99852800
31	170459392
32	340918784
33	581984768
34	1163969536
35	1987020288

[2, 2, 4, 6, 12, 20, 40, 68, 136, 232, 464, 792, 1584, 2704, 5408, 9232, 18464, 31520, 63040, 107616, 215232, 367424, 734848, 1254464, 2508928, 4283008, 8566016, 14623104, 29246208, 49926400, 99852800, 170459392, 340918784, 581984768, 1163969536, 1987020288]

cp's OEIS Frontend

A030435 Expansion of g.f. (1 + x - 2x^2 - x^3)/(1/2 - 2x^2 + x^4).

Table of values

List of values

cp's OEIS Frontend

A030435 Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1/2 - 2*x^2 + x^4).

Table of values

List of values

A030435 Expansion of g.f. (1 + x - 2x^2 - x^3)/(1/2 - 2x^2 + x^4).