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A316552 T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero. 7

%I #4 Jul 06 2018 12:35:20

%S 1,2,2,3,5,3,5,7,7,5,8,17,10,17,8,13,35,17,17,35,13,21,61,36,42,36,61,

%T 21,34,127,69,89,89,69,127,34,55,265,129,187,251,187,129,265,55,89,

%U 507,260,430,621,621,430,260,507,89,144,1013,544,1046,1568,1811,1568,1046,544

%N T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Table starts

%C ..1...2...3....5.....8....13.....21......34......55.......89.......144

%C ..2...5...7...17....35....61....127.....265.....507.....1013......2071

%C ..3...7..10...17....36....69....129.....260.....544.....1125......2348

%C ..5..17..17...42....89...187....430....1046....2407.....5706.....13873

%C ..8..35..36...89...251...621...1568....4269...11869....33451.....95326

%C .13..61..69..187...621..1811...5265...17004...54443...174625....570128

%C .21.127.129..430..1568..5265..18978...73409..276005..1055277...4099795

%C .34.265.260.1046..4269.17004..73409..336604.1492856..6793881..31252764

%C .55.507.544.2407.11869.54443.276005.1492856.7870292.42144065.228096346

%H R. H. Hardin, <a href="/A316552/b316552.txt">Table of n, a(n) for n = 1..263</a>

%F Empirical for column k:

%F k=1: a(n) = a(n-1) +a(n-2)

%F k=2: a(n) = 2*a(n-1) -a(n-2) +4*a(n-3) -4*a(n-4) for n>5

%F k=3: [order 15]

%F k=4: [order 45] for n>48

%e Some solutions for n=5 k=4

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

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

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

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

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

%Y Column 1 is A000045(n+1).

%Y Column 2 is A303802.

%K nonn,tabl

%O 1,2

%A _R. H. Hardin_, Jul 06 2018

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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)