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A298961 Number of nX6 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jan 30 2018 13:13:15

%S 0,5,5,34,91,360,1144,4062,13794,47972,164529,567553,1953217,6732815,

%T 23189914,79894441,275211747,948122291,3266225384,11252104514,

%U 38762888085,133536840437,460029356546,1584785398981,5459526766694

%N Number of nX6 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 6 of A298963.

%H R. H. Hardin, <a href="/A298961/b298961.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 4*a(n-1) -a(n-2) -3*a(n-3) +14*a(n-4) -44*a(n-5) -22*a(n-6) -27*a(n-7) +33*a(n-8) +210*a(n-9) +164*a(n-10) +294*a(n-11) -198*a(n-12) -391*a(n-13) -686*a(n-14) -638*a(n-15) +36*a(n-16) +450*a(n-17) +656*a(n-18) +232*a(n-19) +286*a(n-20) -8*a(n-21) +96*a(n-22) -142*a(n-23) +20*a(n-24) -196*a(n-25) -32*a(n-26) +16*a(n-27) +24*a(n-28) -32*a(n-29) +16*a(n-30)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298963.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 30 2018

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Last modified August 8 11:12 EDT 2024. Contains 375021 sequences. (Running on oeis4.)