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