[seqfan] A162302 (sigma divisibility) incomplete ?

Richard Mathar mathar at strw.leidenuniv.nl
Wed Aug 25 00:01:26 CEST 2010


It seems that
http://oeis.org/classic/A162302 is incomplete. I get
1,
28,
29,
62,
84,
182,
230,
252,
344,
756,
944,
2268,
6710,
6804,
....
or is there something missing in the defn?
Should this simply be replaced by 28*3^n, comments removed?
Richard Mathar

for n from 1 to 20000 do
        if (numtheory[sigma](n)+28) mod n = 0 then
                printf("%d,\n",n) ;
        end if;
end do:





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