1,1
R. K. Guy, Unsolved Problems in Number Theory, E16.
Cf. A005184, A068530.
Adjacent sequences: A068526 A068527 A068528 this_sequence A068530 A068531 A068532
Sequence in context: A074852 A020252 A076486 this_sequence A096059 A065772 A090333
more,nonn
Naohiro Nomoto (n_nomoto(AT)yabumi.com), Mar 22 2002
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