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A202547 Number of nX6 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it) 1

%I

%S 1,32,2094,219934,31670778,5534917394,1078490778110,222425177005132,

%T 47166084815234578,10132160238913275232,2189244152545815718298,

%U 474218997901396743953114,102831073878890605814623386

%N Number of nX6 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it)

%C Column 6 of A202549

%H R. H. Hardin, <a href="/A202547/b202547.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0

%e ..0..0..1..0..1..1....0..0..1..1..1..1....0..0..1..0..0..1....0..0..1..0..0..0

%e ..0..1..1..1..0..2....0..1..1..2..2..1....0..0..1..0..1..2....0..0..0..1..1..1

%e ..0..1..0..0..1..1....0..0..0..1..0..0....0..0..1..0..2..0....0..0..1..0..2..0

%K nonn

%O 1,2

%A _R. H. Hardin_ Dec 20 2011

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Last modified June 28 19:10 EDT 2022. Contains 354907 sequences. (Running on oeis4.)