This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A192275 #17 May 04 2019 21:50:36 %S A192275 7,167,507,543,3433,6707,9615,15690,87667,1023971,2054435,5871045, %T A192275 9150387,14146891,63538839,169623015 %N A192275 Super anti-perfect numbers. %C A192275 Like A019279 but using anti-divisors. sigma*^2(n)=sigma*(sigma*(n))=2n, where sigma*(n) is the sum of the anti-divisors of n. %p A192275 for n from 1 do %p A192275 if A066417(A066417(n)) = 2*n then %p A192275 print(n); %p A192275 end if; %p A192275 end do: # _R. J. Mathar_, Oct 02 2011 %Y A192275 Cf. A019279, A066417. %K A192275 nonn,more %O A192275 1,1 %A A192275 _Paolo P. Lava_, Jun 28 2011 %E A192275 a(9)-a(16) from _Donovan Johnson_, Sep 22 2011