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Search: id:A068780
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A068780 Lesser of twin composite numbers. +0
9
8, 9, 14, 15, 20, 21, 24, 25, 26, 27, 32, 33, 34, 35, 38, 39, 44, 45, 48, 49, 50, 51, 54, 55, 56, 57, 62, 63, 64, 65, 68, 69, 74, 75, 76, 77, 80, 81, 84, 85, 86, 87, 90, 91, 92, 93, 94, 95, 98, 99, 104, 105, 110, 111, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

Select[ Range[2, 200], !PrimeQ[ # ] && !PrimeQ[ # + 1] &]

CROSSREFS

Cf. A001359.

Equals A005381 - 1.

Sequence in context: A076769 A105741 A083134 this_sequence A096784 A059869 A105833

Adjacent sequences: A068777 A068778 A068779 this_sequence A068781 A068782 A068783

KEYWORD

nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 04 2002

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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