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 A202202 T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 101 in rows and columns 9

%I #7 Mar 31 2012 12:36:46

%S 108,240,240,450,640,450,756,1400,1400,756,1176,2688,3500,2688,1176,

%T 1728,4704,7560,7560,4704,1728,2430,7680,14700,18144,14700,7680,2430,

%U 3300,11880,26400,38808,38808,26400,11880,3300,4356,17600,44550,76032,90552

%N T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 101 in rows and columns

%C Table starts

%C ..108...240....450....756....1176....1728.....2430.....3300.....4356......5616

%C ..240...640...1400...2688....4704....7680....11880....17600....25168.....34944

%C ..450..1400...3500...7560...14700...26400....44550....71500...110110....163800

%C ..756..2688...7560..18144...38808...76032...138996...240240...396396....628992

%C .1176..4704..14700..38808...90552..192192...378378...700700..1233232...2079168

%C .1728..7680..26400..76032..192192..439296...926640..1830400..3422848...6110208

%C .2430.11880..44550.138996..378378..926640..2084940..4375800..8664084..16325712

%C .3300.17600..71500.240240..700700.1830400..4375800..9724000.20323160..40310400

%C .4356.25168.110110.396396.1233232.3422848..8664084.20323160.44710952..93117024

%C .5616.34944.163800.628992.2079168.6110208.16325712.40310400.93117024.203164416

%H R. H. Hardin, <a href="/A202202/b202202.txt">Table of n, a(n) for n = 1..839</a>

%F Empirical: column k is a polynomial of degree k+2

%F (via factored column polynomials) T(n,k)=2*(k+2)*(n+2)*product{i=2..k+2 : (n+i) } / n!

%e Some solutions for n=4 k=3

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

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

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

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

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

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

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Dec 14 2011

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Last modified December 6 22:36 EST 2023. Contains 367616 sequences. (Running on oeis4.)