Numbers n=p*q such that p and q are primes and (p-1)divides (q-1)
15, 21, 33, 39, 51, 57, 65, 69, 85, 87, 91, 93, 111, 123, 129, 133, 141, 145, 159, 177
4 seqfan posts
Sun May 16 17:09:31 CEST 2010 [seqfan] Re: Primes embedded
Fri May 14 14:29:43 CEST 2010 [seqfan] Re: Duplicates? A177729 A177517 A177516
Fri May 14 13:30:09 CEST 2010 [seqfan] Re: Duplicates? A177729 A177517 A177516
Fri May 14 12:40:31 CEST 2010 [seqfan] Duplicates? A177729 A177517 A177516
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
Links to OEIS content are included according to
The OEIS End-User License Agreement
.