A164799 - cp's OEIS frontend

A164799 a(n) = the smallest positive integer such that the product of a(n) consecutive integers, where n is the smallest, is divisible by every prime from 2 to the largest prime divisor of the product. (a(1)=1.)

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

[1, 1, 2, 1, 2, 1, 4, 1, 2, 5, 5, 1, 10, 2, 2, 1, 10, 1, 16, 2, 18, 17, 16, 1, 22, 21, 20, 19, 18, 1, 28, 1, 30, 29, 2, 1, 26, 37, 36, 35, 34, 41, 40, 43, 42, 41, 40, 1, 46, 45, 44, 43, 42, 1, 52, 51, 50, 49, 48, 1, 58, 61, 4, 1, 58, 57, 56, 67, 66, 65, 64, 1, 70, 73, 72, 71, 70, 69, 68, 2]

cp's OEIS Frontend

A164799 a(n) = the smallest positive integer such that the product of a(n) consecutive integers, where n is the smallest, is divisible by every prime from 2 to the largest prime divisor of the product. (a(1)=1.)

Table of values

List of values

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

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

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