A128214 - cp's OEIS frontend

A128214 Expansion of (1+2x+3x^2)/(1+x+x^2)^2.

n	a(n)
0	1
1	0
2	0
3	-2
4	3
5	0
6	-5
7	6
8	0
9	-8
10	9
11	0
12	-11
13	12
14	0
15	-14
16	15
17	0
18	-17
19	18
20	0
21	-20
22	21
23	0
24	-23
25	24
26	0
27	-26
28	27
29	0
30	-29
31	30
32	0
33	-32
34	33
35	0
36	-35
37	36
38	0
39	-38
40	39
41	0
42	-41
43	42
44	0
45	-44
46	45
47	0
48	-47
49	48
50	0
51	-50
52	51
53	0
54	-53
55	54
56	0
57	-56
58	57
59	0
60	-59
61	60
62	0
63	-62
64	63
65	0
66	-65

[1, 0, 0, -2, 3, 0, -5, 6, 0, -8, 9, 0, -11, 12, 0, -14, 15, 0, -17, 18, 0, -20, 21, 0, -23, 24, 0, -26, 27, 0, -29, 30, 0, -32, 33, 0, -35, 36, 0, -38, 39, 0, -41, 42, 0, -44, 45, 0, -47, 48, 0, -50, 51, 0, -53, 54, 0, -56, 57, 0, -59, 60, 0, -62, 63, 0, -65]

cp's OEIS Frontend

A128214 Expansion of (1+2x+3x^2)/(1+x+x^2)^2.

Table of values

List of values

n	a(n)
0	1
1	0
2	0
3	-2
4	3
5	0
6	-5
7	6
8	0
9	-8
10	9
11	0
12	-11
13	12
14	0
15	-14
16	15
17	0
18	-17
19	18
20	0
21	-20
22	21
23	0
24	-23
25	24
26	0
27	-26
28	27
29	0
30	-29
31	30
32	0
33	-32
34	33
35	0
36	-35
37	36
38	0
39	-38
40	39
41	0
42	-41
43	42
44	0
45	-44
46	45
47	0
48	-47
49	48
50	0
51	-50
52	51
53	0
54	-53
55	54
56	0
57	-56
58	57
59	0
60	-59
61	60
62	0
63	-62
64	63
65	0
66	-65

n	a(n)
0	1
1	0
2	0
3	-2
4	3
5	0
6	-5
7	6
8	0
9	-8
10	9
11	0
12	-11
13	12
14	0
15	-14
16	15
17	0
18	-17
19	18
20	0
21	-20
22	21
23	0
24	-23
25	24
26	0
27	-26
28	27
29	0
30	-29
31	30
32	0
33	-32
34	33
35	0
36	-35
37	36
38	0
39	-38
40	39
41	0
42	-41
43	42
44	0
45	-44
46	45
47	0
48	-47
49	48
50	0
51	-50
52	51
53	0
54	-53
55	54
56	0
57	-56
58	57
59	0
60	-59
61	60
62	0
63	-62
64	63
65	0
66	-65

n	a(n)
0	1
1	0
2	0
3	-2
4	3
5	0
6	-5
7	6
8	0
9	-8
10	9
11	0
12	-11
13	12
14	0
15	-14
16	15
17	0
18	-17
19	18
20	0
21	-20
22	21
23	0
24	-23
25	24
26	0
27	-26
28	27
29	0
30	-29
31	30
32	0
33	-32
34	33
35	0
36	-35
37	36
38	0
39	-38
40	39
41	0
42	-41
43	42
44	0
45	-44
46	45
47	0
48	-47
49	48
50	0
51	-50
52	51
53	0
54	-53
55	54
56	0
57	-56
58	57
59	0
60	-59
61	60
62	0
63	-62
64	63
65	0
66	-65