A111701 - cp's OEIS frontend

A111701 Least integer obtained when n is divided by prime(1), then by prime(2), then by prime(3), ..., stopping as soon as one of the primes does not divide it. In particular, a(2n-1) = 2n-1.

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

[1, 1, 3, 2, 5, 1, 7, 4, 9, 5, 11, 2, 13, 7, 15, 8, 17, 3, 19, 10, 21, 11, 23, 4, 25, 13, 27, 14, 29, 1, 31, 16, 33, 17, 35, 6, 37, 19, 39, 20, 41, 7, 43, 22, 45, 23, 47, 8, 49, 25, 51, 26, 53, 9, 55, 28, 57, 29, 59, 2, 61, 31, 63, 32, 65, 11, 67, 34, 69, 35, 71, 12, 73, 37, 75, 38, 77]

cp's OEIS Frontend

A111701 Least integer obtained when n is divided by prime(1), then by prime(2), then by prime(3), ..., stopping as soon as one of the primes does not divide it. In particular, a(2n-1) = 2n-1.

Table of values

List of values

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

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

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