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A202547
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Number of nX6 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it)
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1
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1, 32, 2094, 219934, 31670778, 5534917394, 1078490778110, 222425177005132, 47166084815234578, 10132160238913275232, 2189244152545815718298, 474218997901396743953114, 102831073878890605814623386
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