A303705 - cp's OEIS frontend

A303705 a(1) = 3; a(n) is the smallest prime such that gcd(a(i)-1, a(n)-1) = 2 holds for 1 <= i < n.

n	a(n)
1	3
2	5
3	7
4	11
5	23
6	47
7	59
8	83
9	107
10	167
11	179
12	227
13	239
14	263
15	347
16	359
17	383
18	467
19	479
20	503
21	563
22	587
23	719
24	839
25	863
26	887
27	983
28	1019
29	1187
30	1223
31	1283
32	1307
33	1319
34	1367
35	1439
36	1487
37	1523
38	1619
39	1823
40	1907
41	2027
42	2039
43	2063
44	2099
45	2207
46	2243
47	2447

[3, 5, 7, 11, 23, 47, 59, 83, 107, 167, 179, 227, 239, 263, 347, 359, 383, 467, 479, 503, 563, 587, 719, 839, 863, 887, 983, 1019, 1187, 1223, 1283, 1307, 1319, 1367, 1439, 1487, 1523, 1619, 1823, 1907, 2027, 2039, 2063, 2099, 2207, 2243, 2447]

cp's OEIS Frontend

A303705 a(1) = 3; a(n) is the smallest prime such that gcd(a(i)-1, a(n)-1) = 2 holds for 1 <= i < n.

Table of values

List of values