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 A331005 #7 Jan 06 2020 09:15:30 %S A331005 0,1,5,9,11,9,3,-3,-6,-3,3,9,12,8,2,-4,-8,-4,4,12,16,12,4,-6,-10,-6,2, %T A331005 10,14,10,0,-8,-12,-7,3,13,18,13,3,-7,-13,-8,2,12,17,11,1,-9,-14,-9,1, %U A331005 11,17,12,2,-8,-13,-8,4,14,20,14,2,-10,-16,-10,2,16,22 %N A331005 a(n) is the imaginary part of f(n) (as defined in A330780). %H A331005 Rémy Sigrist, <a href="/A331005/b331005.txt">Table of n, a(n) for n = 0..10000</a> %H A331005 Rémy Sigrist, <a href="/A331005/a331005.gp.txt">PARI program for A331005</a> %o A331005 (PARI) See Links section. %Y A331005 Cf. A330780. %K A331005 sign %O A331005 0,3 %A A331005 _Rémy Sigrist_, Jan 05 2020