%I A028500
%S A028500 697,2041,1570153,62722153,10604156641,13544168521
%N A028500 12-hyperperfect numbers: n=12(sigma(n)-n-1)+1.
%H A028500 J. S. McCranie, <a href="http://www.cs.uwaterloo.ca/journals/JIS/index.html">
               A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3</
               a>
%H A028500 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               HyperperfectNumber.html">Link to a section of The World of Mathematics.</
               a>
%Y A028500 Cf. A007593.
%Y A028500 Sequence in context: A111105 A137559 A118059 this_sequence A133251 A116338 
               A157366
%Y A028500 Adjacent sequences: A028497 A028498 A028499 this_sequence A028501 A028502 
               A028503
%K A028500 nonn
%O A028500 1,1
%A A028500 Jud McCranie (j.mccranie(AT)comcast.net)