A258227 - cp's OEIS frontend

A258227 Concatenate the natural numbers, then partition into minimal strings so that adjacent terms have a common divisor greater than 1.

n	a(n)
1	12
2	3
3	45
4	6
5	78
6	9
7	1011
8	12
9	1314
10	15
11	1617
12	18
13	192
14	0
15	2
16	12
17	2
18	2
19	32
20	4
21	2
22	52
23	6
24	2
25	72
26	8
27	2
28	930
29	3
30	132
31	3
32	3
33	3
34	435
35	3
36	6
37	3
38	738
39	3
40	9
41	4041
42	42
43	4
44	34
45	4
46	4
47	54
48	6
49	4
50	74
51	8
52	4
53	950
54	5
55	15
56	25
57	35
58	45
59	5
60	5
61	65
62	75
63	85
64	960
65	6
66	16
67	2
68	6
69	3
70	6

[12, 3, 45, 6, 78, 9, 1011, 12, 1314, 15, 1617, 18, 192, 0, 2, 12, 2, 2, 32, 4, 2, 52, 6, 2, 72, 8, 2, 930, 3, 132, 3, 3, 3, 435, 3, 6, 3, 738, 3, 9, 4041, 42, 4, 34, 4, 4, 54, 6, 4, 74, 8, 4, 950, 5, 15, 25, 35, 45, 5, 5, 65, 75, 85, 960, 6, 16, 2, 6, 3, 6]

cp's OEIS Frontend

A258227 Concatenate the natural numbers, then partition into minimal strings so that adjacent terms have a common divisor greater than 1.

Table of values

List of values