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 A213235 #7 Jun 26 2020 13:22:52 %S A213235 2,1,1,-2,1,-3,1,-4,2,1,-5,5,1,-6,4,2,1,-7,1,-7 %N A213235 Erroneous version of A213234. %H A213235 John Brillhart, John, J. S. Lomont, and Patrick Morton, <a href="http://gdz.sub.uni-goettingen.de/dms/resolveppn/?PPN=GDZPPN002192802">Cyclotomic properties of the Rudin-Shapiro polynomials</a>, J. Reine Angew. Math. 288 (1976), 37-65; see Table 2; MR0498479 (58 #16589). %K A213235 dead %O A213235 0,1