A358153 - cp's OEIS frontend

A358153 Lexicographically earliest infinite sequence of distinct positive integers on a square spiral such that each number shares a factor with its four orthogonally nearest neighbors but shares no factor with its four diagonal next-nearest neighbors.

n	a(n)
1	6
2	10
3	35
4	21
5	77
6	22
7	143
8	39
9	65
10	117
11	12
12	63
13	18
14	20
15	24
16	44
17	26
18	273
19	30
20	195
21	36
22	88
23	42
24	40
25	48
26	14
27	455
28	50
29	175
30	80
31	55
32	33
33	385
34	147
35	539
36	91
37	105
38	110
39	847
40	176
41	1001
42	28
43	119
44	51
45	187
46	153
47	85
48	459
49	595
50	15
51	54
52	351
53	66
54	189
55	72
56	99
57	57
58	95
59	114
60	100
61	78
62	220
63	52
64	60
65	34
66	833

[6, 10, 35, 21, 77, 22, 143, 39, 65, 117, 12, 63, 18, 20, 24, 44, 26, 273, 30, 195, 36, 88, 42, 40, 48, 14, 455, 50, 175, 80, 55, 33, 385, 147, 539, 91, 105, 110, 847, 176, 1001, 28, 119, 51, 187, 153, 85, 459, 595, 15, 54, 351, 66, 189, 72, 99, 57, 95, 114, 100, 78, 220, 52, 60, 34, 833]

cp's OEIS Frontend

A358153 Lexicographically earliest infinite sequence of distinct positive integers on a square spiral such that each number shares a factor with its four orthogonally nearest neighbors but shares no factor with its four diagonal next-nearest neighbors.

Table of values

List of values