0,1

71 is in the sequence because it is the prime number a(20) and the decimal expansion of 71/20=3,55 has only prime digits.

Sequence in context: A038930 A019375 A078784 this_sequence A064739 A112860 A067931

Adjacent sequences: A117193 A117194 A117195 this_sequence A117197 A117198 A117199

base,more,nonn

Luc Stevens (lms022(AT)yahoo.com), Apr 21 2006