A141467 - cp's OEIS frontend

A141467 a(1)=1; for n > 1, a(n) is the product of prime factors of the n-th composite, but with the largest prime incremented by 3 and the smallest decremented by 1.

n	a(n)
1	1
2	6
3	10
4	12
5	8
6	12
7	10
8	16
9	20
10	18
11	16
12	20
13	14
14	24
15	32
16	16
17	36
18	20
19	24
20	40
21	28
22	20
23	40
24	36
25	22
26	32
27	32
28	30
29	28
30	48
31	26
32	48
33	60
34	40
35	40
36	32
37	54
38	56
39	40
40	44
41	32
42	48
43	34
44	60
45	80
46	64
47	42
48	40
49	52
50	50
51	72
52	40
53	80
54	44
55	84
56	48
57	64
58	108
59	44
60	60
61	80
62	46
63	64
64	56
65	72
66	96
67	52
68	68
69	50
70	88
71	96
72	70
73	84

[1, 6, 10, 12, 8, 12, 10, 16, 20, 18, 16, 20, 14, 24, 32, 16, 36, 20, 24, 40, 28, 20, 40, 36, 22, 32, 32, 30, 28, 48, 26, 48, 60, 40, 40, 32, 54, 56, 40, 44, 32, 48, 34, 60, 80, 64, 42, 40, 52, 50, 72, 40, 80, 44, 84, 48, 64, 108, 44, 60, 80, 46, 64, 56, 72, 96, 52, 68, 50, 88, 96, 70, 84]

cp's OEIS Frontend

A141467 a(1)=1; for n > 1, a(n) is the product of prime factors of the n-th composite, but with the largest prime incremented by 3 and the smallest decremented by 1.

Table of values

List of values

n	a(n)
1	1
2	6
3	10
4	12
5	8
6	12
7	10
8	16
9	20
10	18
11	16
12	20
13	14
14	24
15	32
16	16
17	36
18	20
19	24
20	40
21	28
22	20
23	40
24	36
25	22
26	32
27	32
28	30
29	28
30	48
31	26
32	48
33	60
34	40
35	40
36	32
37	54
38	56
39	40
40	44
41	32
42	48
43	34
44	60
45	80
46	64
47	42
48	40
49	52
50	50
51	72
52	40
53	80
54	44
55	84
56	48
57	64
58	108
59	44
60	60
61	80
62	46
63	64
64	56
65	72
66	96
67	52
68	68
69	50
70	88
71	96
72	70
73	84

n	a(n)
1	1
2	6
3	10
4	12
5	8
6	12
7	10
8	16
9	20
10	18
11	16
12	20
13	14
14	24
15	32
16	16
17	36
18	20
19	24
20	40
21	28
22	20
23	40
24	36
25	22
26	32
27	32
28	30
29	28
30	48
31	26
32	48
33	60
34	40
35	40
36	32
37	54
38	56
39	40
40	44
41	32
42	48
43	34
44	60
45	80
46	64
47	42
48	40
49	52
50	50
51	72
52	40
53	80
54	44
55	84
56	48
57	64
58	108
59	44
60	60
61	80
62	46
63	64
64	56
65	72
66	96
67	52
68	68
69	50
70	88
71	96
72	70
73	84

n	a(n)
1	1
2	6
3	10
4	12
5	8
6	12
7	10
8	16
9	20
10	18
11	16
12	20
13	14
14	24
15	32
16	16
17	36
18	20
19	24
20	40
21	28
22	20
23	40
24	36
25	22
26	32
27	32
28	30
29	28
30	48
31	26
32	48
33	60
34	40
35	40
36	32
37	54
38	56
39	40
40	44
41	32
42	48
43	34
44	60
45	80
46	64
47	42
48	40
49	52
50	50
51	72
52	40
53	80
54	44
55	84
56	48
57	64
58	108
59	44
60	60
61	80
62	46
63	64
64	56
65	72
66	96
67	52
68	68
69	50
70	88
71	96
72	70
73	84