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 A086324 #6 Mar 16 2017 20:57:32 %S A086324 1,2,5,8,17,40,79,128,323,544,1025,2560,4097,10112,22643,32768,66047, %T A086324 165376,262145,557056,1513709,2099200,4198399,10485760,17825807, %U A086324 33562624,84672701,165675008,268435457,741965824,1259979967,2147483648,5378137091,8656912384 %N A086324 Number of n X n circulant singular matrices over GF(2). %H A086324 Alois P. Heinz, <a href="/A086324/b086324.txt">Table of n, a(n) for n = 1..1000</a> %F A086324 a(n) = 2^n - A003473(n). %Y A086324 Cf. A003473, A002416. %K A086324 nonn %O A086324 1,2 %A A086324 Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 30 2003 %E A086324 a(10)-a(34) from _Alois P. Heinz_, Mar 16 2017