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A023234 Numbers n such that n and 9n + 4 both prime. 0
3, 7, 11, 17, 23, 31, 37, 41, 67, 71, 73, 83, 97, 107, 113, 137, 163, 191, 193, 197, 223, 263, 283, 307, 311, 317, 337, 353, 367, 373, 401, 421, 461, 491, 577, 601, 613, 617, 631, 643, 647, 653, 661, 683, 727, 743, 751, 773, 797, 821, 823, 853, 857, 881, 883, 907, 947 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

PROG

(MAGMA) [n: n in [0..1000] | IsPrime(n) and IsPrime(9*n+4)] [From V. Librandi, Nov 20 2010]

CROSSREFS

Sequence in context: A191050 A081515 A184856 * A134707 A047838 A188653

Adjacent sequences:  A023231 A023232 A023233 * A023235 A023236 A023237

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.