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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

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

Adjacent sequences:  A112877 A112878 A112879 * A112881 A112882 A112883

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

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Last modified September 26 20:34 EDT 2021. Contains 347672 sequences. (Running on oeis4.)