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Number of unitary amicable pairs in which the smallest member has n digits.
2

%I #7 May 29 2017 13:46:06

%S 0,0,1,1,5,12,59,107,269,641,1457,3553

%N Number of unitary amicable pairs in which the smallest member has n digits.

%H J. O. M. Pedersen, <a href="http://amicable.homepage.dk/knwnunap.htm">Known Unitary Amicable Pairs</a>

%H J. O. M. Pedersen, <a href="http://amicable.homepage.dk/tables.htm">Tables of Aliquot Cycles</a> [Broken link]

%H J. O. M. Pedersen, <a href="http://web.archive.org/web/20140502102524/http://amicable.homepage.dk/tables.htm">Tables of Aliquot Cycles</a> [Via Internet Archive Wayback-Machine]

%H J. O. M. Pedersen, <a href="/A063990/a063990.pdf">Tables of Aliquot Cycles</a> [Cached copy, pdf file only]

%Y Cf. A002952, A002953.

%K nonn,base

%O 1,5

%A _N. J. A. Sloane_, Nov 24 2005

%E The next term, a(13), is at least 6664.