A099304 - cp's OEIS frontend

A099304 Least k > 0 such that (n+k)' = n' + k', where n' denotes the arithmetic derivative of n.

n	a(n)
1	2
2	1
3	6
4	2
5	10
6	3
7	14
8	4
9	18
10	5
11	14
12	6
13	26
14	7
15	30
16	8
17	34
18	9
19	38
20	10
21	42
22	11
23	46
24	12
25	50
26	13
27	54
28	14
29	26
30	15
31	62
32	16
33	42
34	17
35	4
36	18
37	74
38	19
39	78
40	20
41	82
42	21
43	86
44	22
45	90
46	23
47	38
48	24
49	98
50	25
51	102
52	26
53	106
54	27
55	27
56	28
57	114
58	29
59	118
60	30
61	122
62	31
63	126
64	32
65	130
66	33
67	18
68	34
69	138
70	8
71	142

[2, 1, 6, 2, 10, 3, 14, 4, 18, 5, 14, 6, 26, 7, 30, 8, 34, 9, 38, 10, 42, 11, 46, 12, 50, 13, 54, 14, 26, 15, 62, 16, 42, 17, 4, 18, 74, 19, 78, 20, 82, 21, 86, 22, 90, 23, 38, 24, 98, 25, 102, 26, 106, 27, 27, 28, 114, 29, 118, 30, 122, 31, 126, 32, 130, 33, 18, 34, 138, 8, 142]

cp's OEIS Frontend

A099304 Least k > 0 such that (n+k)' = n' + k', where n' denotes the arithmetic derivative of n.

Table of values

List of values

n	a(n)
1	2
2	1
3	6
4	2
5	10
6	3
7	14
8	4
9	18
10	5
11	14
12	6
13	26
14	7
15	30
16	8
17	34
18	9
19	38
20	10
21	42
22	11
23	46
24	12
25	50
26	13
27	54
28	14
29	26
30	15
31	62
32	16
33	42
34	17
35	4
36	18
37	74
38	19
39	78
40	20
41	82
42	21
43	86
44	22
45	90
46	23
47	38
48	24
49	98
50	25
51	102
52	26
53	106
54	27
55	27
56	28
57	114
58	29
59	118
60	30
61	122
62	31
63	126
64	32
65	130
66	33
67	18
68	34
69	138
70	8
71	142

n	a(n)
1	2
2	1
3	6
4	2
5	10
6	3
7	14
8	4
9	18
10	5
11	14
12	6
13	26
14	7
15	30
16	8
17	34
18	9
19	38
20	10
21	42
22	11
23	46
24	12
25	50
26	13
27	54
28	14
29	26
30	15
31	62
32	16
33	42
34	17
35	4
36	18
37	74
38	19
39	78
40	20
41	82
42	21
43	86
44	22
45	90
46	23
47	38
48	24
49	98
50	25
51	102
52	26
53	106
54	27
55	27
56	28
57	114
58	29
59	118
60	30
61	122
62	31
63	126
64	32
65	130
66	33
67	18
68	34
69	138
70	8
71	142

n	a(n)
1	2
2	1
3	6
4	2
5	10
6	3
7	14
8	4
9	18
10	5
11	14
12	6
13	26
14	7
15	30
16	8
17	34
18	9
19	38
20	10
21	42
22	11
23	46
24	12
25	50
26	13
27	54
28	14
29	26
30	15
31	62
32	16
33	42
34	17
35	4
36	18
37	74
38	19
39	78
40	20
41	82
42	21
43	86
44	22
45	90
46	23
47	38
48	24
49	98
50	25
51	102
52	26
53	106
54	27
55	27
56	28
57	114
58	29
59	118
60	30
61	122
62	31
63	126
64	32
65	130
66	33
67	18
68	34
69	138
70	8
71	142