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A179445
Nonprimes m such that 10m + 1 are primes.
1
1, 4, 6, 10, 15, 18, 21, 24, 25, 27, 28, 33, 40, 42, 46, 49, 52, 54, 57, 60, 63, 64, 66, 69, 70, 75, 76, 81, 82, 88, 91, 94, 99, 102, 105, 106, 115, 117, 118, 120, 123, 129, 130, 132, 136, 138, 145, 147, 148, 153, 160, 162, 172, 174, 180, 183, 186, 187, 190, 195, 201
OFFSET
1,2
COMMENTS
Corresponding values of 10m + 1 in A179446.
MATHEMATICA
Select[Complement[Range[500], Prime[Range[PrimePi[500]]]], PrimeQ[10#+1]&] (* Harvey P. Dale, Jul 28 2010 *)
CROSSREFS
Sequence in context: A333846 A076957 A310585 * A310586 A121214 A219047
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jul 14 2010
EXTENSIONS
More terms from Harvey P. Dale, Jul 28 2010
STATUS
approved