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A223678 Number of nX6 0..1 arrays with rows and antidiagonals unimodal 1

%I #4 Mar 25 2013 11:09:02

%S 22,484,7745,105995,1363639,17068664,210660192,2577807779,31402790284,

%T 381690187059,4633795630120,56218000664764,681802614308980,

%U 8267243693472174,100235088136900011,1215221703756846658

%N Number of nX6 0..1 arrays with rows and antidiagonals unimodal

%C Column 6 of A223680

%H R. H. Hardin, <a href="/A223678/b223678.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 22*a(n-1) -151*a(n-2) +461*a(n-3) -797*a(n-4) -4885*a(n-5) +28261*a(n-6) +53750*a(n-7) -398208*a(n-8) +360701*a(n-9) +952132*a(n-10) -5152120*a(n-11) +7572284*a(n-12) +6140578*a(n-13) -18089482*a(n-14) -653352*a(n-15) +28175814*a(n-16) +67786763*a(n-17) -392210630*a(n-18) +717516941*a(n-19) -875602031*a(n-20) +904784133*a(n-21) -930560603*a(n-22) +1037859554*a(n-23) -1035189626*a(n-24) +1256680629*a(n-25) -1842818297*a(n-26) +2256596552*a(n-27) -2217424297*a(n-28) +1613743557*a(n-29) -832569368*a(n-30) +412448612*a(n-31) -308789168*a(n-32) +241553248*a(n-33) -122269952*a(n-34) +31245376*a(n-35) -2822400*a(n-36)

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 25 2013

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)