%I #19 Dec 04 2018 23:28:46
%S 1,6,92,4256,631408,287890282,394680026626,1633299243490821,
%T 20522104351316248402,784379015232375006607050,
%U 91206645757124024620735442618,32264019671635009481678592579241059,34725332380760680832137350774453679498244
%N Half the number of non-self-intersecting paths from one corner of an n X n grid to the opposite corner.
%F a(n) = A007764(n) / 2. - _Andrew Howroyd_, May 12 2017
%Y Cf. A007764.
%K nonn,walk
%O 2,2
%A _Horst H. Manninger_, Jan 14 2000
%E Corrected, additional terms from A007764 by _Andrew Howroyd_, May 12 2017
%E Offset corrected by _Joerg Arndt_, Dec 03 2018