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A202800 Number of nX6 binary arrays with every one adjacent to another one horizontally or vertically 1

%I #5 Mar 31 2012 12:36:52

%S 21,1632,83518,4217066,217145076,11168045764,573985849362,

%T 29502860015392,1516477156642474,77948189988273490,

%U 4006599407114049916,205942439718841896456,10585607796890601624858,544108792600210068202950

%N Number of nX6 binary arrays with every one adjacent to another one horizontally or vertically

%C Column 6 of A202802

%H R. H. Hardin, <a href="/A202800/b202800.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 50*a(n-1) -185*a(n-2) +12651*a(n-3) +6423*a(n-4) +1075408*a(n-5) +3259685*a(n-6) +21586628*a(n-7) +76542794*a(n-8) -2812955781*a(n-9) -9282864749*a(n-10) +76466631235*a(n-11) +267889215760*a(n-12) -1134901643747*a(n-13) -4335336001609*a(n-14) +10870807935088*a(n-15) +46906211644574*a(n-16) -69760341260668*a(n-17) -364808849169564*a(n-18) +285890091915548*a(n-19) +2095267330255204*a(n-20) -582913492790936*a(n-21) -8842390435967576*a(n-22) -589993582990688*a(n-23) +25633677190161424*a(n-24) +6313554877821056*a(n-25) -35770558600735552*a(n-26) -82722026192384*a(n-27) -46013612995587072*a(n-28) -82921963670853632*a(n-29) +185344286677962752*a(n-30) -36821534264311808*a(n-31) +193374756561289216*a(n-32) +778031675832008704*a(n-33) -391301125804916736*a(n-34) +2056655992384389120*a(n-35) -1044699927222943744*a(n-36) +2643514994808848384*a(n-37) -1117027627006164992*a(n-38) +2008203304609251328*a(n-39) -663346463232753664*a(n-40) +962288728338857984*a(n-41) -230985402763182080*a(n-42) +273382571130224640*a(n-43) -34339947158700032*a(n-44) +36028797018963968*a(n-45)

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 24 2011

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Last modified April 23 22:36 EDT 2024. Contains 371917 sequences. (Running on oeis4.)