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 A179073 #17 Dec 05 2018 08:01:46
%S A179073 -2,-18,-4,-70,-882,-32,-182,-29718,-1068,-500,-5604,-4030,-8890182,
%T A179073 -776,-1744,-113582,-4832118,-1118,-1111225770,-1764132,-11018,
%U A179073 -20000849130,-23156,-71011068,-16432,-2205718,-8920484118,-1063532
%N A179073 A179071 for p == 1 (mod 4).
%C A179073 It appears that a(n) is negative and even. (Added Aug 28 2011: This conjecture has been proved by Maxim Vsemirnov.)
%H A179073 M. Vsemirnov, <a href="http://arxiv.org/abs/1108.4031">On R. Chapman's "evil determinant": case p == 1 (mod 4)</a>, arXiv preprint arXiv:1108.4031 [math.NT], 2011-2012.
%t A179073 a71[p_] := Module[{k}, k = (p-1)/2; Det @ Table[JacobiSymbol[j-i, p], {i, 1, k+1}, {j, 1, k+1}]];
%t A179073 a71 /@ Select[Range[1, 301, 4], PrimeQ] (* _Jean-François Alcover_, Dec 05 2018 *)
%Y A179073 Cf. A179071, A179072, A179074.
%K A179073 sign
%O A179073 1,1
%A A179073 _Jonathan Sondow_ and _Wadim Zudilin_, Jun 29 2010