A333947 - cp's OEIS frontend

A333947 a(n) is the smallest k > 0 such that sigma(n+k) = sigma(n); if such k > 0 does not exist, then a(n) = 0.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	7
11	0
12	0
13	0
14	1
15	8
16	9
17	0
18	0
19	0
20	6
21	10
22	0
23	0
24	14
25	0
26	15
27	0
28	11
29	0
30	16
31	0
32	0
33	2
34	19
35	12
36	0
37	0
38	21
39	0
40	18
41	0
42	20
43	0
44	21
45	0
46	5
47	0
48	27
49	0
50	0
51	4
52	45
53	0
54	2
55	16
56	31
57	22
58	31
59	0
60	18
61	0
62	7
63	40
64	0
65	18
66	4
67	0
68	14
69	8
70	24
71	0
72	0
73	0
74	39
75	0
76	63
77	0
78	14
79	0

[0, 0, 0, 0, 0, 5, 0, 0, 0, 7, 0, 0, 0, 1, 8, 9, 0, 0, 0, 6, 10, 0, 0, 14, 0, 15, 0, 11, 0, 16, 0, 0, 2, 19, 12, 0, 0, 21, 0, 18, 0, 20, 0, 21, 0, 5, 0, 27, 0, 0, 4, 45, 0, 2, 16, 31, 22, 31, 0, 18, 0, 7, 40, 0, 18, 4, 0, 14, 8, 24, 0, 0, 0, 39, 0, 63, 0, 14, 0]

cp's OEIS Frontend

A333947 a(n) is the smallest k > 0 such that sigma(n+k) = sigma(n); if such k > 0 does not exist, then a(n) = 0.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	7
11	0
12	0
13	0
14	1
15	8
16	9
17	0
18	0
19	0
20	6
21	10
22	0
23	0
24	14
25	0
26	15
27	0
28	11
29	0
30	16
31	0
32	0
33	2
34	19
35	12
36	0
37	0
38	21
39	0
40	18
41	0
42	20
43	0
44	21
45	0
46	5
47	0
48	27
49	0
50	0
51	4
52	45
53	0
54	2
55	16
56	31
57	22
58	31
59	0
60	18
61	0
62	7
63	40
64	0
65	18
66	4
67	0
68	14
69	8
70	24
71	0
72	0
73	0
74	39
75	0
76	63
77	0
78	14
79	0

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	7
11	0
12	0
13	0
14	1
15	8
16	9
17	0
18	0
19	0
20	6
21	10
22	0
23	0
24	14
25	0
26	15
27	0
28	11
29	0
30	16
31	0
32	0
33	2
34	19
35	12
36	0
37	0
38	21
39	0
40	18
41	0
42	20
43	0
44	21
45	0
46	5
47	0
48	27
49	0
50	0
51	4
52	45
53	0
54	2
55	16
56	31
57	22
58	31
59	0
60	18
61	0
62	7
63	40
64	0
65	18
66	4
67	0
68	14
69	8
70	24
71	0
72	0
73	0
74	39
75	0
76	63
77	0
78	14
79	0

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	7
11	0
12	0
13	0
14	1
15	8
16	9
17	0
18	0
19	0
20	6
21	10
22	0
23	0
24	14
25	0
26	15
27	0
28	11
29	0
30	16
31	0
32	0
33	2
34	19
35	12
36	0
37	0
38	21
39	0
40	18
41	0
42	20
43	0
44	21
45	0
46	5
47	0
48	27
49	0
50	0
51	4
52	45
53	0
54	2
55	16
56	31
57	22
58	31
59	0
60	18
61	0
62	7
63	40
64	0
65	18
66	4
67	0
68	14
69	8
70	24
71	0
72	0
73	0
74	39
75	0
76	63
77	0
78	14
79	0