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 A011628 #11 Jul 08 2025 02:31:26
%S A011628 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 A011628 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,-1,1,
%U A011628 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 A011628 Legendre symbol (n,233).
%D A011628 G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers. 3rd ed., Oxford Univ. Press, 1954, p. 68.
%t A011628 Table[ JacobiSymbol[n, 233], {n, 0, 80}] (* _Jean-François Alcover_, Oct 08 2013 *)
%K A011628 sign,mult
%O A011628 0,1
%A A011628 _N. J. A. Sloane_