A115301 Permutations of decimal digits 1-9 giving three 3-digit primes.

127463859, 127643859, 127859463, 127859643, 149257683, 149257863, 149263587, 149263857, 149563827, 149587263, 149653827, 149683257, 149827563, 149827653, 149857263, 149863257, 157463829, 157643829, 157829463, 157829643, 163457829

Offset

1,1

Comments

There are 816 such permutations, last six a(811)-a(816) being 983467521, 983521467, 983521647, 983641257, 983647251, 983647521.

Links

Eric M. Schmidt, Table of n, a(n) for n = 1..816 (complete sequence)

Example

127463859 => 127, 463, 859 all prime; 127643859 => 127, 643, 859 all prime etc.

Mathematica

Select[Permutations[Range[9]], Union[PrimeQ/@FromDigits/@Partition[ #, 3]]--{True}&]

Crossrefs

Sequence in context: A319065 A344832 A334346 * A256118 A036341 A184648

Adjacent sequences: A115298 A115299 A115300 * A115302 A115303 A115304

Keyword

fini,full,nonn,base

Author

Zak Seidov, Mar 04 2006

Status

approved