%I
%S 1,1,2,2,4,4,10,9,26,24,76,69,236,214,760,696,2522,2326,8556,7942,
%T 29504,27562,103130,96862,364548,344004,1300820,1232567,4679472,
%U 4449850,16952162,16171118,61790442,59107890,226451036,217157069,833918840
%N Half the number of ways of placing up to n pawns on a length n chessboard row so that the row balances at its middle.
%C Odd terms are A047653
%Y Cf. A047653.
%K nonn
%O 1,3
%A _R. H. Hardin_, Nov 24 2007
