A283616 - cp's OEIS frontend

A283616 a(n) = Product_{k=2..floor(sqrt(2n-1)/2)+1} (2n-1) mod (2k-1).

n	a(n)
1	1
2	1
3	2
4	1
5	0
6	2
7	1
8	0
9	4
10	4
11	0
12	6
13	0
14	0
15	8
16	1
17	0
18	0
19	4
20	0
21	12
22	3
23	0
24	20
25	0
26	0
27	24
28	0
29	0
30	24
31	5
32	0
33	0
34	32
35	0
36	16
37	9
38	0
39	0
40	56
41	0
42	72
43	0
44	0
45	320
46	0
47	0
48	0
49	84
50	0
51	24
52	240
53	0
54	512
55	160
56	0
57	90
58	0
59	0
60	0
61	0
62	0
63	0
64	12
65	0
66	500
67	0
68	0
69	160
70	672
71	0
72	0
73	0
74	0
75	2880
76	1792
77	0
78	0
79	72
80	0
81	0
82	378

[1, 1, 2, 1, 0, 2, 1, 0, 4, 4, 0, 6, 0, 0, 8, 1, 0, 0, 4, 0, 12, 3, 0, 20, 0, 0, 24, 0, 0, 24, 5, 0, 0, 32, 0, 16, 9, 0, 0, 56, 0, 72, 0, 0, 320, 0, 0, 0, 84, 0, 24, 240, 0, 512, 160, 0, 90, 0, 0, 0, 0, 0, 0, 12, 0, 500, 0, 0, 160, 672, 0, 0, 0, 0, 2880, 1792, 0, 0, 72, 0, 0, 378]

cp's OEIS Frontend

A283616 a(n) = Product_{k=2..floor(sqrt(2n-1)/2)+1} (2n-1) mod (2k-1).

Table of values

List of values