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 A118986 #16 Jun 22 2024 03:39:58 %S A118986 1,2,3,6,14,46,176,908,5802,44053 %N A118986 Number of different values taken by the permanent of a symmetric real (0,1)-matrix of order n. %H A118986 Minfeng Wang, <a href="/A118986/a118986.cpp.txt">C++ program to calculate A118986</a> %Y A118986 Cf. A087983, A118985, A118987, A118988. %Y A118986 Cf. A006125 (number of symmetric real (0,1)-matrices of order (n-1)). %K A118986 nonn,more %O A118986 0,2 %A A118986 _Giovanni Resta_, May 08 2006 %E A118986 a(8) from _Minfeng Wang_, Jun 12 2024 %E A118986 a(0)=1 prepended by _Alois P. Heinz_, Jun 12 2024 %E A118986 a(9) from _Minfeng Wang_, Jun 18 2024