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Search: id:A115301
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| A115301 |
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Permutations of decimal digits 1-9 giving three 3d primes. |
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1
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| 127463859, 127643859, 127859463, 127859643, 149257683, 149257863, 149263587, 149263857, 149563827, 149587263, 149653827, 149683257, 149827563, 149827653, 149857263, 149863257, 157463829, 157643829, 157829463, 157829643, 163457829
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OFFSET
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1,1
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COMMENT
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There are 816 such permutations, last six a(811)-a(816) being 983467521, 983521467, 983521647, 983641257, 983647251, 983647521.
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EXAMPLE
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127463859 => 127, 463, 859 all prime; 127643859 => 127, 643, 859 all prime etc.
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MATHEMATICA
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Select[Permutations[Range[9]], Union[PrimeQ/@FromDigits/@Partition[ #, 3]]--{True}&]
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CROSSREFS
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Sequence in context: A050289 A053654 A068249 this_sequence A036341 A059092 A011577
Adjacent sequences: A115298 A115299 A115300 this_sequence A115302 A115303 A115304
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KEYWORD
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fini,nonn,base
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Mar 04 2006
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