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 A100889 #10 Feb 10 2020 09:02:06 %S A100889 1,2,-1,2,-1,2,-2,1,-1,0,-3,1,-3,0,-2,-4,-3,1,-4,2,0,3,0,1,3,3,4,3,0, %T A100889 -1,0,5,3,-5,4,0,4,0,0,0,-4 %N A100889 Real part of the multiplier m of the multiperfect Gaussian integer A100884(n)+i*A100885(n). %C A100889 Let the Gaussian integer z = A100884(n)+i*A100885(n). Then a(n) = Re(m) = Re( sigma(z)/z) . %Y A100889 Cf. A100884, A100885, A100890. %K A100889 sign,more %O A100889 1,2 %A A100889 _Yasutoshi Kohmoto_ %E A100889 Edited, all values replaced by _R. J. Mathar_, Mar 12 2010 %E A100889 a(10)-a(41) from _Amiram Eldar_, Feb 10 2020