%I A054377
%S A054377 2,6,42,1806,47058,2214502422,52495396602,
%T A054377 8490421583559688410706771261086
%N A054377 Primary pseudoperfect numbers.
%C A054377 Primary pseudoperfect numbers are the solution of the differential equation 
               n'=n-1, being n' the arithmetic derivative of n. [From Paolo P. Lava 
               (ppl(AT)spl.at), Nov 16 2009]
%D A054377 Butske, W.; Jaje, L.M.; and Mayernik, D.R. "The Equation $ Sum_{p|N}{1/
               p+1/N}=1$, Pseudoperfect Numbers and Partially Weighted Graphs." 
               Math. Comput., _69_, 407-420, 1999.
%H A054377 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PrimaryPseudoperfectNumber.html">Link to a section of The World of 
               Mathematics.</a>
%Y A054377 Sequence in context: A115961 A123137 A014117 this_sequence A007018 A100016 
               A000610
%Y A054377 Adjacent sequences: A054374 A054375 A054376 this_sequence A054378 A054379 
               A054380
%K A054377 nonn,more,new
%O A054377 1,1
%A A054377 Eric Weisstein (eric(AT)weisstein.com)