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 A331004 #7 Jan 06 2020 09:15:21 %S A331004 0,2,4,2,-2,-6,-9,-6,0,6,9,6,0,-8,-11,-8,0,8,12,8,0,-8,-12,-7,1,9,13, %T A331004 9,1,-7,-12,-8,0,10,15,10,0,-10,-15,-10,2,12,17,12,2,-10,-15,-10,0,10, %U A331004 15,10,-2,-12,-17,-12,-2,8,14,9,-3,-15,-21,-15,-3,9,15,8 %N A331004 a(n) is the real part of f(n) (as defined in A330780). %H A331004 Rémy Sigrist, <a href="/A331004/b331004.txt">Table of n, a(n) for n = 0..10000</a> %H A331004 Rémy Sigrist, <a href="/A331004/a331004.gp.txt">PARI program for A331004</a> %o A331004 (PARI) See Links section. %Y A331004 Cf. A330780. %K A331004 sign %O A331004 0,2 %A A331004 _Rémy Sigrist_, Jan 05 2020