Search: id:A039656
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%I A039656
%S A039656 2,6,4,27,12,9,121,301,930,484,578,441,1273,468,4863,3171,9216,8373,
%T A039656 19692,19416,25442,13440,19230,16641,16804,83161,100652,226181,203400,
%U A039656 133200,419248,380979,744796,553296,634710,539476,505584,674416,634206
%N A039656 Becomes prime after n iterations of f(x) = sigma(x)-1 (least inverse 
               of A039655).
%Y A039656 Cf. A039649-A039655.
%Y A039656 Sequence in context: A096085 A106831 A038212 this_sequence A006233 A164020 
               A057643
%Y A039656 Adjacent sequences: A039653 A039654 A039655 this_sequence A039657 A039658 
               A039659
%K A039656 nonn
%O A039656 0,1
%A A039656 David W. Wilson (davidwwilson(AT)comcast.net)

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