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A225343
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Number of nX7 -1,1 arrays such that the sum over i=1..n,j=1..7 of i*x(i,j) is zero, the sum of x(i,j) is zero, and rows are nondecreasing (number of ways to distribute 7-across galley oarsmen left-right at n fore-aft positions so that there are no turning moments on the ship)
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1
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0, 0, 0, 22, 0, 0, 0, 25056, 0, 0, 0, 47084448, 0, 0, 0, 110202390974, 0, 0, 0, 291612344834026, 0, 0, 0, 834664320724959518, 0, 0, 0, 2522954614267660110474, 0, 0, 0, 7938386813443913197221460, 0, 0, 0, 25757964315025150183357153902, 0, 0, 0
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