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A112880
The factors k(n) such that the twin-prime subsequence A112879 is obtained.
2
12, 18, 492, 702, 2310, 2370, 130650, 980910, 5528418, 21357012
OFFSET
1,1
EXAMPLE
12*3^2-1=107, 107 and 109 twin primes so k(1)=12
18*107^2-1=206081, 206081 and 206083 twin primes so k(2)=18
CROSSREFS
Cf. A112879.
Sequence in context: A238922 A212128 A110932 * A211083 A100541 A337424
KEYWORD
hard,nonn
AUTHOR
Pierre CAMI, Oct 01 2005
EXTENSIONS
Removed misleading mention of a(n) in NAME. - R. J. Mathar, Jun 20 2021
STATUS
approved