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 A011627 #10 Jul 08 2025 02:31:20 %S A011627 0,1,-1,1,1,1,-1,-1,-1,1,-1,1,1,-1,1,1,1,1,-1,1,1,-1,-1,-1,-1,1,1,1, %T A011627 -1,-1,-1,-1,-1,1,-1,-1,1,1,-1,-1,-1,-1,1,1,1,1,1,-1,1,1,-1,1,-1,1,-1, %U A011627 1,1,1,1,-1,1,1,1,-1,1,-1,-1,-1,1,-1,1,1,-1,-1,-1,1,1,-1,1,-1,1 %N A011627 Legendre symbol (n,229). %D A011627 G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers. 3rd ed., Oxford Univ. Press, 1954, p. 68. %t A011627 JacobiSymbol[Range[0,80],229] (* _Harvey P. Dale_, Feb 12 2022 *) %K A011627 sign,mult %O A011627 0,1 %A A011627 _N. J. A. Sloane_