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A129820 List of pairs of consecutive nonprime odd numbers {m-1,m+1}. 0
25, 27, 33, 35, 49, 51, 55, 57, 63, 65, 75, 77, 85, 87, 91, 93, 93, 95, 115, 117, 117, 119, 119, 121, 121, 123, 123, 125, 133, 135, 141, 143, 143, 145, 145, 147, 153, 155, 159, 161, 169, 171, 175, 177, 183, 185, 185, 187, 187, 189 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

MATHEMATICA

Flatten[Table[If[OddQ[n - 1] && PrimeQ[n - 1] == False && PrimeQ[n + 1] == False, {{n - 1}, {n + 1}}, {}], {n, 2, 200}]]

CROSSREFS

Sequence in context: A183982 A287763 A239523 * A096522 A195351 A015734

Adjacent sequences:  A129817 A129818 A129819 * A129821 A129822 A129823

KEYWORD

nonn

AUTHOR

Roger L. Bagula, May 20 2007

STATUS

approved

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Last modified October 16 21:57 EDT 2018. Contains 316275 sequences. (Running on oeis4.)