A257314 - cp's OEIS frontend

A257314 a(1) = 18; a(2) = 19; for n > 2, a(n) is the smallest number of the form prime + 16 not already used which shares a factor with a(n-1).

n	a(n)
1	18
2	19
3	57
4	21
5	27
6	33
7	39
8	45
9	35
10	63
11	69
12	23
13	207
14	75
15	87
16	29
17	435
18	95
19	105
20	77
21	99
22	117
23	123
24	129
25	147
26	119
27	153
28	165
29	125
30	155
31	195
32	143
33	209
34	285
35	183
36	189
37	213
38	243
39	249
40	83
41	1079
42	273
43	245
44	215
45	255
46	267
47	89
48	623
49	287
50	329
51	47
52	893
53	323
54	399
55	279
56	297

[18, 19, 57, 21, 27, 33, 39, 45, 35, 63, 69, 23, 207, 75, 87, 29, 435, 95, 105, 77, 99, 117, 123, 129, 147, 119, 153, 165, 125, 155, 195, 143, 209, 285, 183, 189, 213, 243, 249, 83, 1079, 273, 245, 215, 255, 267, 89, 623, 287, 329, 47, 893, 323, 399, 279, 297]

cp's OEIS Frontend

A257314 a(1) = 18; a(2) = 19; for n > 2, a(n) is the smallest number of the form prime + 16 not already used which shares a factor with a(n-1).

Table of values

List of values