1,1
Cf. A031157 (lucky primes)
Sequence in context: A009770 A132121 A070957 * A080165 A063535 A091653
Adjacent sequences: A166741 A166742 A166743 * A166745 A166746 A166747
nonn
Gabriel Finch (salsaman(AT)xs4all.nl), Oct 21 2009