1,1

1193,1201,1213,1217,1223,1229,1231,1237,1249,1259 are ten consecutive primes which are all emirps and 1193,1201,1213,1217,1223 is the first occurrence of five consecutive primes which are all emirps, so a(5) = a(6) = a(7) = a(8) = a(9) = a(10) = 1193.

Cf. A006567, A070905, A071614.

Sequence in context: A147187 A147069 A146471 this_sequence A059796 A112230 A121932

Adjacent sequences: A071609 A071610 A071611 this_sequence A071613 A071614 A071615

base,more,nonn

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 27 2002