A334684 - cp's OEIS frontend

A334684 a(n) is the least number that can be reached starting from n and iterating the nondeterministic map x -> x/d where d is a proper divisor of x whose decimal representation appears in that of x.

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

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 6, 13, 14, 3, 16, 17, 18, 19, 10, 21, 11, 23, 6, 5, 13, 27, 14, 29, 10, 31, 16, 11, 34, 7, 6, 37, 38, 13, 10, 41, 21, 43, 11, 9, 46, 47, 6, 49, 10, 51, 13, 53, 54, 11, 56, 57, 58, 59, 10, 61, 31, 21, 16, 13, 11, 67, 68, 69]

cp's OEIS Frontend

A334684 a(n) is the least number that can be reached starting from n and iterating the nondeterministic map x -> x/d where d is a proper divisor of x whose decimal representation appears in that of x.

Table of values

List of values

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

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

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