A134339 - cp's OEIS frontend

A134339 a(n) = product of the positive "non-isolated divisors" of (2n). A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n.

n	a(n)
1	2
2	2
3	6
4	2
5	2
6	24
7	2
8	2
9	6
10	40
11	2
12	24
13	2
14	2
15	180
16	2
17	2
18	24
19	2
20	40
21	252
22	2
23	2
24	24
25	2
26	2
27	6
28	112
29	2
30	720
31	2
32	2
33	6
34	2
35	2
36	1728
37	2
38	2
39	6
40	40
41	2
42	1008
43	2
44	2
45	16200
46	2
47	2
48	24
49	2
50	40
51	6
52	2
53	2
54	24
55	220
56	112
57	6
58	2
59	2
60	720
61	2
62	2
63	252
64	2
65	2
66	3168
67	2
68	2
69	6
70	40
71	2
72	1728
73	2
74	2
75	180
76	2
77	2
78	3744
79	2
80	40
81	6

[2, 2, 6, 2, 2, 24, 2, 2, 6, 40, 2, 24, 2, 2, 180, 2, 2, 24, 2, 40, 252, 2, 2, 24, 2, 2, 6, 112, 2, 720, 2, 2, 6, 2, 2, 1728, 2, 2, 6, 40, 2, 1008, 2, 2, 16200, 2, 2, 24, 2, 40, 6, 2, 2, 24, 220, 112, 6, 2, 2, 720, 2, 2, 252, 2, 2, 3168, 2, 2, 6, 40, 2, 1728, 2, 2, 180, 2, 2, 3744, 2, 40, 6]

cp's OEIS Frontend

A134339 a(n) = product of the positive "non-isolated divisors" of (2n). A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n.

Table of values

List of values