A287309 - cp's OEIS frontend

A287309 Primes that can be generated by the concatenation in base 7, in descending order, of two consecutive integers read in base 10.

n	a(n)
1	7
2	23
3	31
4	47
5	449
6	499
7	599
8	1049
9	1249
10	1399
11	1499
12	1549
13	1699
14	1949
15	1999
16	2099
17	2399
18	18919
19	20639
20	20983
21	24767
22	25111
23	25799
24	29927
25	30271
26	31991
27	33023
28	38183
29	40591
30	45751
31	46439
32	48847
33	51599
34	52631
35	57791
36	59167
37	60887
38	61231
39	64327
40	66047
41	67079
42	68111

[7, 23, 31, 47, 449, 499, 599, 1049, 1249, 1399, 1499, 1549, 1699, 1949, 1999, 2099, 2399, 18919, 20639, 20983, 24767, 25111, 25799, 29927, 30271, 31991, 33023, 38183, 40591, 45751, 46439, 48847, 51599, 52631, 57791, 59167, 60887, 61231, 64327, 66047, 67079, 68111]

cp's OEIS Frontend

A287309 Primes that can be generated by the concatenation in base 7, in descending order, of two consecutive integers read in base 10.

Table of values

List of values