A066435 - cp's OEIS frontend

A066435 Conjectured values for a(n) = least natural number k such that sigma(n+k) = sigma(n)+sigma(k) if it exists; otherwise 0.

n	a(n)
1	2
2	1
3	0
4	5
5	4
6	2
7	14
8	2
9	0
10	5
11	22
12	43
13	26
14	7
15	0
16	496
17	34
18	2
19	38
20	37
21	0
22	11
23	46
24	6
25	50
26	13
27	0
28	4
29	26
30	10
31	62
32	929
33	282
34	17
35	28
36	252
37	20
38	19
39	0
40	101
41	8
42	14
43	12
44	19
45	17
46	23
47	38
48	307
49	98
50	25
51	54
52	65
53	106
54	51
55	14
56	14
57	0
58	29
59	118
60	66
61	56
62	30
63	0
64	8128
65	22
66	22
67	44
68	85
69	66
70	35
71	135
72	18

[2, 1, 0, 5, 4, 2, 14, 2, 0, 5, 22, 43, 26, 7, 0, 496, 34, 2, 38, 37, 0, 11, 46, 6, 50, 13, 0, 4, 26, 10, 62, 929, 282, 17, 28, 252, 20, 19, 0, 101, 8, 14, 12, 19, 17, 23, 38, 307, 98, 25, 54, 65, 106, 51, 14, 14, 0, 29, 118, 66, 56, 30, 0, 8128, 22, 22, 44, 85, 66, 35, 135, 18]

cp's OEIS Frontend

A066435 Conjectured values for a(n) = least natural number k such that sigma(n+k) = sigma(n)+sigma(k) if it exists; otherwise 0.

Table of values

List of values