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A144834 Numbers n such that the two numbers n+1 and n+3 are both prime. +0
2
2, 4, 10, 16, 28, 40, 58, 70, 100, 106, 136, 148, 178, 190, 196, 226, 238, 268, 280, 310, 346, 418, 430, 460, 520, 568, 598, 616, 640, 658, 808, 820, 826, 856, 880, 1018, 1030, 1048, 1060, 1090, 1150, 1228, 1276, 1288, 1300, 1318, 1426, 1450, 1480, 1486, 1606 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n) = A014574(n)-2 = A001359(n)-1. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 24 2008

CROSSREFS

Sequence in context: A111149 A123689 A137928 this_sequence A006584 A032246 A141138

Adjacent sequences: A144831 A144832 A144833 this_sequence A144835 A144836 A144837

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Sep 22 2008

EXTENSIONS

Definition edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 24 2008

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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