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A153329 Numbers n such that 5*n+1 is not prime. 1
0, 1, 3, 4, 5, 7, 9, 10, 11, 13, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 27, 28, 29, 31, 32, 33, 34, 35, 37, 39, 40, 41, 43, 44, 45, 46, 47, 49, 51, 52, 53, 55, 57, 58, 59, 60, 61, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 85, 87 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

COMMENTS

Of course for all odd n 5n+1 is not prime. [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jun 18 2010]

CROSSREFS

Cf. A024894.

Sequence in context: A081606 A079945 A039017 * A047251 A183213 A183172

Adjacent sequences:  A153326 A153327 A153328 * A153330 A153331 A153332

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 23 2008

EXTENSIONS

Erroneous comment deleted by N. J. A. Sloane, Jun 23 2010

0 added by Arkadiusz Wesolowski, Aug 03 2011

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Last modified February 14 08:47 EST 2012. Contains 205614 sequences.