A344487 - cp's OEIS frontend

A344487 a(n) is the least k such that n is divisible by the sum of digits of k and k is divisible by the sum of digits of n; a(n) = -1 if no such k exists.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	1
11	10
12	3
13	76
14	10
15	12
16	35
17	296
18	9
19	10
20	2
21	3
22	20
23	10
24	6
25	14
26	184
27	9
28	10
29	20999
30	3
31	100
32	10
33	12
34	98
35	16
36	9
37	10
38	11
39	12
40	4
41	10
42	6
43	99799
44	40
45	9
46	10
47	2099999
48	12
49	52
50	5
51	12
52	49
53	1000
54	9
55	10
56	11
57	12
58	1001
59	7998998
60	6
61	7999999
62	200
63	9
64	10

[1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 10, 3, 76, 10, 12, 35, 296, 9, 10, 2, 3, 20, 10, 6, 14, 184, 9, 10, 20999, 3, 100, 10, 12, 98, 16, 9, 10, 11, 12, 4, 10, 6, 99799, 40, 9, 10, 2099999, 12, 52, 5, 12, 49, 1000, 9, 10, 11, 12, 1001, 7998998, 6, 7999999, 200, 9, 10]

cp's OEIS Frontend

A344487 a(n) is the least k such that n is divisible by the sum of digits of k and k is divisible by the sum of digits of n; a(n) = -1 if no such k exists.

Table of values

List of values