A087213 - cp's OEIS frontend

A087213 Expansion of (1+x-4x^2) / ((1+x)(1-4*x^2)).

n	a(n)
0	1
1	0
2	0
3	4
4	-4
5	20
6	-20
7	84
8	-84
9	340
10	-340
11	1364
12	-1364
13	5460
14	-5460
15	21844
16	-21844
17	87380
18	-87380
19	349524
20	-349524
21	1398100
22	-1398100
23	5592404
24	-5592404
25	22369620
26	-22369620
27	89478484
28	-89478484
29	357913940
30	-357913940
31	1431655764
32	-1431655764
33	5726623060

[1, 0, 0, 4, -4, 20, -20, 84, -84, 340, -340, 1364, -1364, 5460, -5460, 21844, -21844, 87380, -87380, 349524, -349524, 1398100, -1398100, 5592404, -5592404, 22369620, -22369620, 89478484, -89478484, 357913940, -357913940, 1431655764, -1431655764, 5726623060]

cp's OEIS Frontend

A087213 Expansion of (1+x-4x^2) / ((1+x)(1-4*x^2)).

Table of values

List of values

cp's OEIS Frontend

A087213 Expansion of (1+x-4*x^2) / ((1+x)*(1-4*x^2)).

Table of values

List of values

A087213 Expansion of (1+x-4x^2) / ((1+x)(1-4*x^2)).