A326925 - cp's OEIS frontend

A326925 Irregular triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of (1-x)/(1-x-x^2)).

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715

[1, -1, 0, 2, -1, 1, 0, 3, -1, 1, 4, 0, 4, -1, 2, 5, 10, 0, 5, -1, 3, 12, 15, 20, 0, 6, -1, 5, 21, 42, 35, 35, 0, 7, -1, 8, 40, 84, 112, 70, 56, 0, 8, -1, 13, 72, 180, 252, 252, 126, 84, 0, 9, -1, 21, 130, 360, 600, 630, 504, 210, 120, 0, 10, -1, 34, 231, 715]

cp's OEIS Frontend

A326925 Irregular triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of (1-x)/(1-x-x^2)).

Table of values

List of values

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715

n	a(n)
1	1
2	-1
3	0
4	2
5	-1
6	1
7	0
8	3
9	-1
10	1
11	4
12	0
13	4
14	-1
15	2
16	5
17	10
18	0
19	5
20	-1
21	3
22	12
23	15
24	20
25	0
26	6
27	-1
28	5
29	21
30	42
31	35
32	35
33	0
34	7
35	-1
36	8
37	40
38	84
39	112
40	70
41	56
42	0
43	8
44	-1
45	13
46	72
47	180
48	252
49	252
50	126
51	84
52	0
53	9
54	-1
55	21
56	130
57	360
58	600
59	630
60	504
61	210
62	120
63	0
64	10
65	-1
66	34
67	231
68	715