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 A285878 #11 May 04 2017 15:02:19 %S A285878 1,18,324,5658,98766,1683597,28677387,479763588,8014917042, %T A285878 132060434889,2170519816231 %N A285878 Number of possible chess games at the end of the n-th ply starting with just pawns and king. %C A285878 Gives the number of possible chess games where both sides start without queens, rooks, knights, and bishops. %C A285878 Does not include games which end in fewer than n plies. %C A285878 Initial terms computed using the Chesspresso engine. %H A285878 Bernhard Seybold, <a href="http://www.chesspresso.org/">Chesspresso</a>. %e A285878 a(1) = 18 since each pawn can move forward 1 or 2 squares (16 moves) or the king can move left or right (2 moves). %Y A285878 Cf. A048987 (standard), A285873 (no queens), A285874 (no rooks), A285875 (no knights), A285876 (no bishops), A285877 (no pawns). %K A285878 nonn,hard,more,fini %O A285878 0,2 %A A285878 _Sean A. Irvine_, Apr 28 2017 %E A285878 a(10) from _Sean A. Irvine_, May 04 2017