A232237 - cp's OEIS frontend

A232237 Primes p such that p-2 and q are primes, where q is concatenation of binary representations of p and p-2: q = p * 2^L + p-2, where L is the length of binary representation of p-2: L=A070939(p-2).

n	a(n)
1	5
2	7
3	31
4	271
5	283
6	433
7	1291
8	1321
9	1429
10	1489
11	1951
12	4723
13	5503
14	6091
15	6133
16	6553
17	6871
18	16651
19	16981
20	17029
21	17191
22	17209
23	17749
24	17791
25	18541
26	18919
27	19471
28	20149
29	20479
30	20551
31	20809
32	21319
33	21649
34	21739
35	22111
36	25309
37	25801
38	27061
39	27409
40	27541
41	27691
42	28549
43	29131

[5, 7, 31, 271, 283, 433, 1291, 1321, 1429, 1489, 1951, 4723, 5503, 6091, 6133, 6553, 6871, 16651, 16981, 17029, 17191, 17209, 17749, 17791, 18541, 18919, 19471, 20149, 20479, 20551, 20809, 21319, 21649, 21739, 22111, 25309, 25801, 27061, 27409, 27541, 27691, 28549, 29131]

cp's OEIS Frontend

A232237 Primes p such that p-2 and q are primes, where q is concatenation of binary representations of p and p-2: q = p * 2^L + p-2, where L is the length of binary representation of p-2: L=A070939(p-2).

Table of values

List of values