A258836 - cp's OEIS frontend

A258836 Least practical number q with q-1 and q+1 twin prime such that n = q'/q for some practical number q' with q'-1 and q'+1 twin prime.

n	a(n)
1	4
2	6
3	4
4	18
5	6
6	12
7	6
8	30
9	12
10	6
11	18
12	6
13	150
14	30
15	4
16	12
17	60
18	4
19	12
20	12
21	42
22	30
23	240
24	18
25	6
26	12
27	4
28	270
29	12
30	6
31	42
32	6
33	6
34	30
35	12
36	12
37	180
38	6
39	60
40	6
41	30
42	150
43	30
44	30
45	4
46	18
47	2550
48	4
49	18
50	12
51	42
52	6
53	150
54	30
55	12
56	60
57	4
58	6
59	60
60	4
61	462
62	180
63	1230
64	18
65	30
66	108
67	60
68	180
69	12
70	6
71	30
72	6
73	570
74	420
75	462
76	180
77	6
78	4
79	198
80	42
81	522
82	600
83	1050
84	42
85	12
86	12
87	4
88	60
89	432
90	18
91	12
92	60
93	30
94	60
95	6
96	12
97	150
98	60
99	30
100	6

[4, 6, 4, 18, 6, 12, 6, 30, 12, 6, 18, 6, 150, 30, 4, 12, 60, 4, 12, 12, 42, 30, 240, 18, 6, 12, 4, 270, 12, 6, 42, 6, 6, 30, 12, 12, 180, 6, 60, 6, 30, 150, 30, 30, 4, 18, 2550, 4, 18, 12, 42, 6, 150, 30, 12, 60, 4, 6, 60, 4, 462, 180, 1230, 18, 30, 108, 60, 180, 12, 6, 30, 6, 570, 420, 462, 180, 6, 4, 198, 42, 522, 600, 1050, 42, 12, 12, 4, 60, 432, 18, 12, 60, 30, 60, 6, 12, 150, 60, 30, 6]

cp's OEIS Frontend

A258836 Least practical number q with q-1 and q+1 twin prime such that n = q'/q for some practical number q' with q'-1 and q'+1 twin prime.

Table of values

List of values