A323227 - cp's OEIS frontend

A323227 a(n) = [x^n] (1 - 2x + x^2 - 2x^3 + x^4)/((1 - x)^2(1 - 2x)).

n	a(n)
0	1
1	2
2	4
3	6
4	9
5	14
6	23
7	40
8	73
9	138
10	267
11	524
12	1037
13	2062
14	4111
15	8208
16	16401
17	32786
18	65555
19	131092
20	262165
21	524310
22	1048599
23	2097176
24	4194329
25	8388634
26	16777243
27	33554460
28	67108893
29	134217758
30	268435487
31	536870944
32	1073741857
33	2147483682
34	4294967331
35	8589934628

[1, 2, 4, 6, 9, 14, 23, 40, 73, 138, 267, 524, 1037, 2062, 4111, 8208, 16401, 32786, 65555, 131092, 262165, 524310, 1048599, 2097176, 4194329, 8388634, 16777243, 33554460, 67108893, 134217758, 268435487, 536870944, 1073741857, 2147483682, 4294967331, 8589934628]

cp's OEIS Frontend

A323227 a(n) = [x^n] (1 - 2x + x^2 - 2x^3 + x^4)/((1 - x)^2(1 - 2x)).

Table of values

List of values

cp's OEIS Frontend

A323227 a(n) = [x^n] (1 - 2*x + x^2 - 2*x^3 + x^4)/((1 - x)^2*(1 - 2*x)).

Table of values

List of values

A323227 a(n) = [x^n] (1 - 2x + x^2 - 2x^3 + x^4)/((1 - x)^2(1 - 2x)).