[seqfan] A055387

[israel at math.ubc.ca]

A055387 is "Prime numbers such that some permutation (possibly omitting 
zeros) of digits is a prime." Well, the identity permutation of the digits 
of a prime is always a prime, so maybe it means nontrivial permutation. But 
no: the Data starts with 2, 3, 5, 7, 11, which have no nontrivial 
permutations of the digits. Should we perhaps remove those terms?

Also, is it any zeros that can be omitted, or leading zeros? The Data 
includes 101, 103, 109 and 307, whose only nontrivial digit permutations 
that are prime require omitting leading zeros in (0)11, (0)13 or (0)31, 
(0)19, and (0)37 or (0)73. I can't think of a good reason to omit 
non-leading zeros.

Cheers,
Robert