1,1

Cf. A153166 Numbers n with property that 6n+1 is prime and uses only digits 2 and 3.

Sequence in context: A139043 A125599 A153166 this_sequence A131272 A083117 A129055

Adjacent sequences: A153165 A153166 A153167 this_sequence A153169 A153170 A153171

nonn,base

Zak Seidov (zakseidov(AT)yahoo.com), Dec 20 2008