A335840 - cp's OEIS frontend

A335840 Expansion of x(1+2x)/((1-2x)(1-x+4*x^2)).

n	a(n)
1	1
2	5
3	9
4	5
5	1
6	45
7	169
8	245
9	81
10	125
11	1849
12	5445
13	6241
14	845
15	8649
16	70805
17	167281
18	146205
19	1369
20	465125
21	2556801
22	4890605
23	3052009
24	266805
25	21613201
26	87654845
27	135419769
28	53235845
29	48427681
30	909226125
31	2862999049
32	3521061845
33	659000241
34	3754622045

[1, 5, 9, 5, 1, 45, 169, 245, 81, 125, 1849, 5445, 6241, 845, 8649, 70805, 167281, 146205, 1369, 465125, 2556801, 4890605, 3052009, 266805, 21613201, 87654845, 135419769, 53235845, 48427681, 909226125, 2862999049, 3521061845, 659000241, 3754622045]

cp's OEIS Frontend

A335840 Expansion of x(1+2x)/((1-2x)(1-x+4*x^2)).

Table of values

List of values

cp's OEIS Frontend

A335840 Expansion of x*(1+2*x)/((1-2*x)*(1-x+4*x^2)).

Table of values

List of values

A335840 Expansion of x(1+2x)/((1-2x)(1-x+4*x^2)).