A174355 - cp's OEIS frontend

A174355 Natural numbers n such that the concatenations n//1331 and 1331//n are prime numbers.

n	a(n)
1	53
2	57
3	153
4	249
5	279
6	329
7	333
8	339
9	347
10	381
11	399
12	431
13	471
14	489
15	641
16	647
17	711
18	821
19	851
20	923
21	959
22	987
23	1169
24	1239
25	1313
26	1383
27	1479
28	1547
29	1563
30	1589
31	1611
32	1653
33	1677
34	1709
35	1773
36	1863
37	1887
38	1973
39	2031
40	2067

[53, 57, 153, 249, 279, 329, 333, 339, 347, 381, 399, 431, 471, 489, 641, 647, 711, 821, 851, 923, 959, 987, 1169, 1239, 1313, 1383, 1479, 1547, 1563, 1589, 1611, 1653, 1677, 1709, 1773, 1863, 1887, 1973, 2031, 2067]

cp's OEIS Frontend

A174355 Natural numbers n such that the concatenations n//1331 and 1331//n are prime numbers.

Table of values

List of values