1,1
Eric Weisstein's World of Mathematics, Weakly Prime
Cf. A050249.
Sequence in context: A093792 A068241 A104328 this_sequence A050249 A023351 A109031
Adjacent sequences: A158121 A158122 A158123 this_sequence A158125 A158126 A158127
nonn
E. W. Weisstein (eric(AT)weisstein.com), Mar 13, 2009
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