A081806 - cp's OEIS frontend

A081806 Least positive number that can be written using prime factors of n (with repetition) and the operations add and subtract.

n	a(n)
2	2
3	3
4	4
5	5
6	1
7	7
8	2
9	6
10	3
11	11
12	1
13	13
14	5
15	2
16	4
17	17
18	2
19	19
20	1
21	4
22	9
23	23
24	1
25	10
26	11
27	3
28	3
29	29
30	4
31	31
32	2
33	8
34	15
35	2
36	2
37	37
38	17
39	10
40	1
41	41
42	2
43	43
44	7
45	1
46	21
47	47
48	1
49	14
50	2
51	14
52	9
53	53
54	1
55	6
56	1
57	16
58	27
59	59
60	2
61	61
62	29
63	1
64	4
65	8
66	6
67	67
68	13
69	20
70	4
71	71
72	2
73	73
74	35
75	3
76	15
77	4
78	8
79	79
80	1
81	6
82	39
83	83
84	4
85	12
86	41
87	26
88	5

[2, 3, 4, 5, 1, 7, 2, 6, 3, 11, 1, 13, 5, 2, 4, 17, 2, 19, 1, 4, 9, 23, 1, 10, 11, 3, 3, 29, 4, 31, 2, 8, 15, 2, 2, 37, 17, 10, 1, 41, 2, 43, 7, 1, 21, 47, 1, 14, 2, 14, 9, 53, 1, 6, 1, 16, 27, 59, 2, 61, 29, 1, 4, 8, 6, 67, 13, 20, 4, 71, 2, 73, 35, 3, 15, 4, 8, 79, 1, 6, 39, 83, 4, 12, 41, 26, 5]

cp's OEIS Frontend

A081806 Least positive number that can be written using prime factors of n (with repetition) and the operations add and subtract.

Table of values

List of values

n	a(n)
2	2
3	3
4	4
5	5
6	1
7	7
8	2
9	6
10	3
11	11
12	1
13	13
14	5
15	2
16	4
17	17
18	2
19	19
20	1
21	4
22	9
23	23
24	1
25	10
26	11
27	3
28	3
29	29
30	4
31	31
32	2
33	8
34	15
35	2
36	2
37	37
38	17
39	10
40	1
41	41
42	2
43	43
44	7
45	1
46	21
47	47
48	1
49	14
50	2
51	14
52	9
53	53
54	1
55	6
56	1
57	16
58	27
59	59
60	2
61	61
62	29
63	1
64	4
65	8
66	6
67	67
68	13
69	20
70	4
71	71
72	2
73	73
74	35
75	3
76	15
77	4
78	8
79	79
80	1
81	6
82	39
83	83
84	4
85	12
86	41
87	26
88	5

n	a(n)
2	2
3	3
4	4
5	5
6	1
7	7
8	2
9	6
10	3
11	11
12	1
13	13
14	5
15	2
16	4
17	17
18	2
19	19
20	1
21	4
22	9
23	23
24	1
25	10
26	11
27	3
28	3
29	29
30	4
31	31
32	2
33	8
34	15
35	2
36	2
37	37
38	17
39	10
40	1
41	41
42	2
43	43
44	7
45	1
46	21
47	47
48	1
49	14
50	2
51	14
52	9
53	53
54	1
55	6
56	1
57	16
58	27
59	59
60	2
61	61
62	29
63	1
64	4
65	8
66	6
67	67
68	13
69	20
70	4
71	71
72	2
73	73
74	35
75	3
76	15
77	4
78	8
79	79
80	1
81	6
82	39
83	83
84	4
85	12
86	41
87	26
88	5

n	a(n)
2	2
3	3
4	4
5	5
6	1
7	7
8	2
9	6
10	3
11	11
12	1
13	13
14	5
15	2
16	4
17	17
18	2
19	19
20	1
21	4
22	9
23	23
24	1
25	10
26	11
27	3
28	3
29	29
30	4
31	31
32	2
33	8
34	15
35	2
36	2
37	37
38	17
39	10
40	1
41	41
42	2
43	43
44	7
45	1
46	21
47	47
48	1
49	14
50	2
51	14
52	9
53	53
54	1
55	6
56	1
57	16
58	27
59	59
60	2
61	61
62	29
63	1
64	4
65	8
66	6
67	67
68	13
69	20
70	4
71	71
72	2
73	73
74	35
75	3
76	15
77	4
78	8
79	79
80	1
81	6
82	39
83	83
84	4
85	12
86	41
87	26
88	5