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A153222 Numbers n such that n and 6n+7 are both prime 0
2, 5, 11, 17, 29, 31, 37, 61, 67, 71, 89, 101, 109, 127, 137, 167, 181, 191, 199, 229, 241, 257, 269, 277, 281, 311, 331, 337, 347, 359, 379, 389, 397, 419, 431, 457, 491, 499, 509, 541, 571, 577, 587, 601, 617, 631, 641, 647, 691, 709, 739, 751, 757, 769, 787 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

For n=2, 6n+7=19; n=587, 6n+7=3529

CROSSREFS

Cf. A153218, A153219

Sequence in context: A157421 A038390 A048210 * A023222 A007491 A124850

Adjacent sequences:  A153219 A153220 A153221 * A153223 A153224 A153225

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 21 2008

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.