A328610 - cp's OEIS frontend

A328610 Irregular triangular array read by rows: the rows show the coefficients of the first of two factors of even-degree polynomials described in Comments.

n	a(n)
1	-2
2	1
3	1
4	0
5	1
6	1
7	3
8	0
9	1
10	2
11	4
12	6
13	0
14	1
15	3
16	10
17	10
18	10
19	0
20	1
21	5
22	18
23	30
24	20
25	15
26	0
27	1
28	8
29	35
30	63
31	70
32	35
33	21
34	0
35	1
36	13
37	64
38	140
39	168
40	140
41	56
42	28
43	0
44	1
45	21
46	117
47	288
48	420
49	378
50	252
51	84
52	36
53	0
54	1
55	34
56	210
57	585
58	960
59	1050
60	756
61	420
62	120
63	45
64	0
65	1
66	55
67	374

[-2, 1, 1, 0, 1, 1, 3, 0, 1, 2, 4, 6, 0, 1, 3, 10, 10, 10, 0, 1, 5, 18, 30, 20, 15, 0, 1, 8, 35, 63, 70, 35, 21, 0, 1, 13, 64, 140, 168, 140, 56, 28, 0, 1, 21, 117, 288, 420, 378, 252, 84, 36, 0, 1, 34, 210, 585, 960, 1050, 756, 420, 120, 45, 0, 1, 55, 374]

cp's OEIS Frontend

A328610 Irregular triangular array read by rows: the rows show the coefficients of the first of two factors of even-degree polynomials described in Comments.

Table of values

List of values