A358610 - cp's OEIS frontend

A358610 Numbers k such that the concatenation 1,2,3,... up to (k-1) is one less than a multiple of k.

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	10
7	13
8	20
9	25
10	40
11	50
12	52
13	100
14	125
15	200
16	250
17	400
18	475
19	500
20	601
21	848
22	908
23	1000
24	1120
25	1250
26	1750
27	2000
28	2500
29	2800
30	2900
31	3670
32	4000
33	4375
34	4685
35	5000
36	6085
37	7000
38	7640
39	7924
40	8375
41	10000
42	10900
43	12500
44	13346
45	14000
46	17800
47	20000
48	21568
49	25000

[1, 2, 4, 5, 8, 10, 13, 20, 25, 40, 50, 52, 100, 125, 200, 250, 400, 475, 500, 601, 848, 908, 1000, 1120, 1250, 1750, 2000, 2500, 2800, 2900, 3670, 4000, 4375, 4685, 5000, 6085, 7000, 7640, 7924, 8375, 10000, 10900, 12500, 13346, 14000, 17800, 20000, 21568, 25000]

cp's OEIS Frontend

A358610 Numbers k such that the concatenation 1,2,3,... up to (k-1) is one less than a multiple of k.

Table of values

List of values