A160403 - OEIS

%I #2 Mar 31 2012 10:26:15

%S 2357,23057,2300057,230000000057,2300000000000000000000057,

%T 230000000000000000000000000000000057,

%U 2300000000000000000000000000000000057

%N Primes starting and ending respectively with 23 and 57, and with either no space or only 0's in between.

%K nonn,base

%O 1,1

%A _Lekraj Beedassy_, May 13 2009