Search: id:A007621
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%I A007621 M5337
%S A007621 70,102,114,138,174,186,222,246,258,282,318,350,354,366,372,402,426,438,
               444,
%T A007621 474,490,492,498,516,534,550,564,572,582,606,618,636,642,650,654,678,708,
               732,
%U A007621 738,748,762,770,774,786,804,822,834,836,846,852,876,894,906,910,940,942,
               948
%N A007621 Impractical numbers: even abundant numbers (A005101) that are not practical(2) 
               (A007620).
%D A007621 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007621 R. Honsberger, Mathematical Gems, M.A.A., 1973, p. 113.
%Y A007621 A005101 with A007620 removed. Cf. A035480.
%Y A007621 Sequence in context: A165632 A136117 A156718 this_sequence A051971 A075004 
               A043222
%Y A007621 Adjacent sequences: A007618 A007619 A007620 this_sequence A007622 A007623 
               A007624
%K A007621 nonn
%O A007621 1,1
%A A007621 N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, Robert G. 
               Wilson v (rgwv(AT)rgwv.com)
%E A007621 More terms from David W. Wilson (davidwwilson(AT)comcast.net).

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