A343750 - cp's OEIS frontend

A343750 Let S be the set of all numbers that can be obtained by permuting the digits of n (leading zeros can be omitted). Then a(n) is that element of S with the smallest number of divisors. In case of a tie, choose the smallest.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	1
11	11
12	21
13	13
14	41
15	15
16	61
17	17
18	81
19	19
20	2
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	82
29	29
30	3
31	13
32	23
33	33
34	43
35	53
36	63
37	37
38	83
39	39
40	4
41	41
42	24
43	43
44	44
45	45
46	46
47	47
48	48
49	49
50	5
51	15
52	25
53	53
54	45
55	55
56	65
57	57
58	58
59	59
60	6
61	61
62	26
63	63
64	46
65	65

[1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 11, 21, 13, 41, 15, 61, 17, 81, 19, 2, 21, 22, 23, 24, 25, 26, 27, 82, 29, 3, 13, 23, 33, 43, 53, 63, 37, 83, 39, 4, 41, 24, 43, 44, 45, 46, 47, 48, 49, 5, 15, 25, 53, 45, 55, 65, 57, 58, 59, 6, 61, 26, 63, 46, 65]

cp's OEIS Frontend

A343750 Let S be the set of all numbers that can be obtained by permuting the digits of n (leading zeros can be omitted). Then a(n) is that element of S with the smallest number of divisors. In case of a tie, choose the smallest.

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	1
11	11
12	21
13	13
14	41
15	15
16	61
17	17
18	81
19	19
20	2
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	82
29	29
30	3
31	13
32	23
33	33
34	43
35	53
36	63
37	37
38	83
39	39
40	4
41	41
42	24
43	43
44	44
45	45
46	46
47	47
48	48
49	49
50	5
51	15
52	25
53	53
54	45
55	55
56	65
57	57
58	58
59	59
60	6
61	61
62	26
63	63
64	46
65	65

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	1
11	11
12	21
13	13
14	41
15	15
16	61
17	17
18	81
19	19
20	2
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	82
29	29
30	3
31	13
32	23
33	33
34	43
35	53
36	63
37	37
38	83
39	39
40	4
41	41
42	24
43	43
44	44
45	45
46	46
47	47
48	48
49	49
50	5
51	15
52	25
53	53
54	45
55	55
56	65
57	57
58	58
59	59
60	6
61	61
62	26
63	63
64	46
65	65

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	1
11	11
12	21
13	13
14	41
15	15
16	61
17	17
18	81
19	19
20	2
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	82
29	29
30	3
31	13
32	23
33	33
34	43
35	53
36	63
37	37
38	83
39	39
40	4
41	41
42	24
43	43
44	44
45	45
46	46
47	47
48	48
49	49
50	5
51	15
52	25
53	53
54	45
55	55
56	65
57	57
58	58
59	59
60	6
61	61
62	26
63	63
64	46
65	65