A377320 - cp's OEIS frontend

A377320 a(n) is the smallest positive integer k such that n + k and n - k have the same number of prime factors.

n	a(n)
4	1
5	1
6	1
7	3
8	2
9	2
10	2
11	6
12	1
13	5
14	3
15	2
16	3
17	6
18	1
19	1
20	3
21	2
22	9
23	2
24	2
25	5
26	3
27	4
28	6
29	1
30	1
31	11
32	6
33	4
34	1
35	6
36	2
37	2
38	2
39	2
40	3
41	8
42	1
43	1
44	3
45	2
46	4
47	3
48	4
49	12
50	1
51	1
52	3
53	2
54	3
55	1
56	1
57	3
58	2
59	7
60	1
61	4
62	7
63	4
64	3
65	6
66	5
67	1
68	2
69	1
70	3
71	5
72	1
73	3
74	4
75	4
76	3
77	1
78	4
79	13
80	6
81	2
82	5
83	15
84	2
85	7
86	1
87	3
88	3
89	1
90	3

[1, 1, 1, 3, 2, 2, 2, 6, 1, 5, 3, 2, 3, 6, 1, 1, 3, 2, 9, 2, 2, 5, 3, 4, 6, 1, 1, 11, 6, 4, 1, 6, 2, 2, 2, 2, 3, 8, 1, 1, 3, 2, 4, 3, 4, 12, 1, 1, 3, 2, 3, 1, 1, 3, 2, 7, 1, 4, 7, 4, 3, 6, 5, 1, 2, 1, 3, 5, 1, 3, 4, 4, 3, 1, 4, 13, 6, 2, 5, 15, 2, 7, 1, 3, 3, 1, 3]

cp's OEIS Frontend

A377320 a(n) is the smallest positive integer k such that n + k and n - k have the same number of prime factors.

Table of values

List of values

n	a(n)
4	1
5	1
6	1
7	3
8	2
9	2
10	2
11	6
12	1
13	5
14	3
15	2
16	3
17	6
18	1
19	1
20	3
21	2
22	9
23	2
24	2
25	5
26	3
27	4
28	6
29	1
30	1
31	11
32	6
33	4
34	1
35	6
36	2
37	2
38	2
39	2
40	3
41	8
42	1
43	1
44	3
45	2
46	4
47	3
48	4
49	12
50	1
51	1
52	3
53	2
54	3
55	1
56	1
57	3
58	2
59	7
60	1
61	4
62	7
63	4
64	3
65	6
66	5
67	1
68	2
69	1
70	3
71	5
72	1
73	3
74	4
75	4
76	3
77	1
78	4
79	13
80	6
81	2
82	5
83	15
84	2
85	7
86	1
87	3
88	3
89	1
90	3

n	a(n)
4	1
5	1
6	1
7	3
8	2
9	2
10	2
11	6
12	1
13	5
14	3
15	2
16	3
17	6
18	1
19	1
20	3
21	2
22	9
23	2
24	2
25	5
26	3
27	4
28	6
29	1
30	1
31	11
32	6
33	4
34	1
35	6
36	2
37	2
38	2
39	2
40	3
41	8
42	1
43	1
44	3
45	2
46	4
47	3
48	4
49	12
50	1
51	1
52	3
53	2
54	3
55	1
56	1
57	3
58	2
59	7
60	1
61	4
62	7
63	4
64	3
65	6
66	5
67	1
68	2
69	1
70	3
71	5
72	1
73	3
74	4
75	4
76	3
77	1
78	4
79	13
80	6
81	2
82	5
83	15
84	2
85	7
86	1
87	3
88	3
89	1
90	3

n	a(n)
4	1
5	1
6	1
7	3
8	2
9	2
10	2
11	6
12	1
13	5
14	3
15	2
16	3
17	6
18	1
19	1
20	3
21	2
22	9
23	2
24	2
25	5
26	3
27	4
28	6
29	1
30	1
31	11
32	6
33	4
34	1
35	6
36	2
37	2
38	2
39	2
40	3
41	8
42	1
43	1
44	3
45	2
46	4
47	3
48	4
49	12
50	1
51	1
52	3
53	2
54	3
55	1
56	1
57	3
58	2
59	7
60	1
61	4
62	7
63	4
64	3
65	6
66	5
67	1
68	2
69	1
70	3
71	5
72	1
73	3
74	4
75	4
76	3
77	1
78	4
79	13
80	6
81	2
82	5
83	15
84	2
85	7
86	1
87	3
88	3
89	1
90	3