1,1
Cf. A000040, A003617, A073914, A139053, A139054.
Sequence in context: A068820 A129670 A057324 this_sequence A076491 A105226 A139021
Adjacent sequences: A139049 A139050 A139051 this_sequence A139053 A139054 A139055
base,more,nonn,tabf
Omar E. Pol (info(AT)polprimos.com), Apr 08 2008
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