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A133406 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. 0

%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

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Last modified February 11 00:17 EST 2016. Contains 268159 sequences.