A097073 - cp's OEIS frontend

A097073 Expansion of (1-x+2x^2)/((1+x)(1-2*x)).

n	a(n)
0	1
1	0
2	4
3	4
4	12
5	20
6	44
7	84
8	172
9	340
10	684
11	1364
12	2732
13	5460
14	10924
15	21844
16	43692
17	87380
18	174764
19	349524
20	699052
21	1398100
22	2796204
23	5592404
24	11184812
25	22369620
26	44739244
27	89478484
28	178956972
29	357913940
30	715827884
31	1431655764
32	2863311532

[1, 0, 4, 4, 12, 20, 44, 84, 172, 340, 684, 1364, 2732, 5460, 10924, 21844, 43692, 87380, 174764, 349524, 699052, 1398100, 2796204, 5592404, 11184812, 22369620, 44739244, 89478484, 178956972, 357913940, 715827884, 1431655764, 2863311532]

cp's OEIS Frontend

A097073 Expansion of (1-x+2x^2)/((1+x)(1-2*x)).

Table of values

List of values

cp's OEIS Frontend

A097073 Expansion of (1-x+2*x^2)/((1+x)*(1-2*x)).

Table of values

List of values

A097073 Expansion of (1-x+2x^2)/((1+x)(1-2*x)).