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