A128213 - cp's OEIS frontend

A128213 Expansion of (1-x+2x^2-2x^3)/(1-x+x^2)^2.

n	a(n)
0	1
1	1
2	1
3	-1
4	-4
5	-4
6	1
7	7
8	7
9	-1
10	-10
11	-10
12	1
13	13
14	13
15	-1
16	-16
17	-16
18	1
19	19
20	19
21	-1
22	-22
23	-22
24	1
25	25
26	25
27	-1
28	-28
29	-28
30	1
31	31
32	31
33	-1
34	-34
35	-34
36	1
37	37
38	37
39	-1
40	-40
41	-40
42	1
43	43
44	43
45	-1
46	-46
47	-46
48	1
49	49
50	49
51	-1
52	-52
53	-52
54	1
55	55
56	55
57	-1
58	-58
59	-58
60	1
61	61
62	61
63	-1

[1, 1, 1, -1, -4, -4, 1, 7, 7, -1, -10, -10, 1, 13, 13, -1, -16, -16, 1, 19, 19, -1, -22, -22, 1, 25, 25, -1, -28, -28, 1, 31, 31, -1, -34, -34, 1, 37, 37, -1, -40, -40, 1, 43, 43, -1, -46, -46, 1, 49, 49, -1, -52, -52, 1, 55, 55, -1, -58, -58, 1, 61, 61, -1]

cp's OEIS Frontend

A128213 Expansion of (1-x+2x^2-2x^3)/(1-x+x^2)^2.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	-1
4	-4
5	-4
6	1
7	7
8	7
9	-1
10	-10
11	-10
12	1
13	13
14	13
15	-1
16	-16
17	-16
18	1
19	19
20	19
21	-1
22	-22
23	-22
24	1
25	25
26	25
27	-1
28	-28
29	-28
30	1
31	31
32	31
33	-1
34	-34
35	-34
36	1
37	37
38	37
39	-1
40	-40
41	-40
42	1
43	43
44	43
45	-1
46	-46
47	-46
48	1
49	49
50	49
51	-1
52	-52
53	-52
54	1
55	55
56	55
57	-1
58	-58
59	-58
60	1
61	61
62	61
63	-1

n	a(n)
0	1
1	1
2	1
3	-1
4	-4
5	-4
6	1
7	7
8	7
9	-1
10	-10
11	-10
12	1
13	13
14	13
15	-1
16	-16
17	-16
18	1
19	19
20	19
21	-1
22	-22
23	-22
24	1
25	25
26	25
27	-1
28	-28
29	-28
30	1
31	31
32	31
33	-1
34	-34
35	-34
36	1
37	37
38	37
39	-1
40	-40
41	-40
42	1
43	43
44	43
45	-1
46	-46
47	-46
48	1
49	49
50	49
51	-1
52	-52
53	-52
54	1
55	55
56	55
57	-1
58	-58
59	-58
60	1
61	61
62	61
63	-1

n	a(n)
0	1
1	1
2	1
3	-1
4	-4
5	-4
6	1
7	7
8	7
9	-1
10	-10
11	-10
12	1
13	13
14	13
15	-1
16	-16
17	-16
18	1
19	19
20	19
21	-1
22	-22
23	-22
24	1
25	25
26	25
27	-1
28	-28
29	-28
30	1
31	31
32	31
33	-1
34	-34
35	-34
36	1
37	37
38	37
39	-1
40	-40
41	-40
42	1
43	43
44	43
45	-1
46	-46
47	-46
48	1
49	49
50	49
51	-1
52	-52
53	-52
54	1
55	55
56	55
57	-1
58	-58
59	-58
60	1
61	61
62	61
63	-1