1,1
Cf. A000668.
Adjacent sequences: A135629 A135630 A135631 this_sequence A135633 A135634 A135635
Sequence in context: A117912 A092047 A057809 this_sequence A068541 A108425 A059569
easy,nonn
Omar E. Pol (info(AT)polprimos.com), Nov 27 2007
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