%I A007539 M4297
%S A007539 1,6,120,30240,14182439040,154345556085770649600,
%T A007539 141310897947438348259849402738485523264343544818565120000,
%U A007539 8268099687077761372899241948635962893501943883292455548843932421413884476391773708366277840568053624227289196\
               057256213348352000000000
%N A007539 First n-fold perfect number.
%D A007539 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007539 A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, 
               p. 22.
%D A007539 A. Brousseau, Number Theory Tables. Fibonacci Association, San Jose, 
               CA, 1973, p. 138.
%D A007539 R. K. Guy, Unsolved Problems in Number Theory, B2.
%H A007539 Walter Nissen, <a href="http://upforthecount.com/math/abundance.html">
               Abundancy : Some Resources </a>
%H A007539 C. K. Caldwell, The Prime Glossary, <a href="http://primes.utm.edu/glossary/
               page.php?sort=Multiplyperfect">multiply perfect</a>
%H A007539 Achim Flammenkamp, <a href="http://www.uni-bielefeld.de/~achim/mpn.html">
               The Multiply Perfect Numbers Page</a>
%H A007539 Fred Helenius, <a href="http://pw1.netcom.com/~fredh/index.html">Link 
               to Glossary and Lists</a>
%Y A007539 Cf. A000396, A005820, A027687, A046060, A046061.
%Y A007539 Cf. A007691, A072002.
%Y A007539 Sequence in context: A012475 A053777 A023199 this_sequence A040996 A110442 
               A137149
%Y A007539 Adjacent sequences: A007536 A007537 A007538 this_sequence A007540 A007541 
               A007542
%K A007539 nonn,nice
%O A007539 1,2
%A A007539 N. J. A. Sloane (njas(AT)research.att.com).
%E A007539 More terms sent by Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 30 2000