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A124518 Numbers n such that 10n-1 and 10n+1 are twin primes. 7
3, 6, 15, 18, 24, 27, 42, 57, 60, 66, 81, 102, 105, 123, 129, 132, 162, 195, 213, 231, 234, 255, 273, 279, 297, 300, 312, 330, 333, 336, 339, 354, 393, 402, 405, 423, 426, 465, 480, 501, 510, 528, 552, 564, 585, 588, 609, 627, 630, 636, 645, 657, 666, 669, 678 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

MATHEMATICA

Select[Range[678], And @@ PrimeQ[{-1, 1} + 10# ] &] (*Chandler*)

CROSSREFS

Cf. A040040, A045753, A002822, A124065, A124519-A124522, A063983.

Sequence in context: A066904 A059969 A176547 * A160724 A212060 A174279

Adjacent sequences:  A124515 A124516 A124517 * A124519 A124520 A124521

KEYWORD

nonn

AUTHOR

Artur Jasinski, Nov 04 2006

STATUS

approved

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Last modified June 19 19:50 EDT 2013. Contains 226416 sequences.