A112880 - OEIS

%I #5 Jun 20 2021 09:40:19

%S 12,18,492,702,2310,2370,130650,980910,5528418,21357012

%N The factors k(n) such that the twin-prime subsequence A112879 is obtained.

%e 12*3^2-1=107, 107 and 109 twin primes so k(1)=12

%e 18*107^2-1=206081, 206081 and 206083 twin primes so k(2)=18

%Y Cf. A112879.

%K hard,nonn

%O 1,1

%A _Pierre CAMI_, Oct 01 2005

%E Removed misleading mention of a(n) in NAME. - _R. J. Mathar_, Jun 20 2021