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A075749 Numbers n such that 210*n -/+ 1 are twin primes. 1
2, 5, 11, 13, 16, 28, 29, 30, 35, 36, 42, 44, 50, 51, 55, 57, 73, 86, 104, 121, 125, 128, 135, 140, 147, 148, 157, 158, 160, 161, 165, 168, 179, 193, 204, 205, 209, 223, 244, 247, 249, 251, 255, 264, 271, 273, 277, 281, 282, 290, 302, 304, 310, 312, 313, 316 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

n=2: 210*1-1=419 and 210*1+1=421 are twin primes.

MATHEMATICA

Select[Range[6! ], PrimeQ[210*#-1]&&PrimeQ[210*#+1]&] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 08 2010]

CROSSREFS

Sequence in context: A062889 A065433 A032541 * A138837 A038899 A118753

Adjacent sequences:  A075746 A075747 A075748 * A075750 A075751 A075752

KEYWORD

easy,nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Oct 08 2002

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Last modified February 14 20:13 EST 2012. Contains 205663 sequences.