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A299654 T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 7

%I #4 Feb 15 2018 14:43:08

%S 1,2,2,4,8,4,8,32,32,8,16,128,247,128,16,32,512,1924,1924,512,32,64,

%T 2048,14981,29408,14981,2048,64,128,8192,116654,448993,448993,116654,

%U 8192,128,256,32768,908360,6856789,13431706,6856789,908360,32768,256,512,131072

%N T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Table starts

%C ...1......2........4...........8.............16...............32

%C ...2......8.......32.........128............512.............2048

%C ...4.....32......247........1924..........14981...........116654

%C ...8....128.....1924.......29408.........448993..........6856789

%C ..16....512....14981......448993.......13431706........401989538

%C ..32...2048...116654.....6856789......401989538......23582064542

%C ..64...8192...908360...104711327....12030404350....1383316377321

%C .128..32768..7073213..1599074414...360039414559...81146123707386

%C .256.131072.55077652.24419877459.10775053220325.4760069868306954

%H R. H. Hardin, <a href="/A299654/b299654.txt">Table of n, a(n) for n = 1..241</a>

%F Empirical for column k:

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

%F k=2: a(n) = 4*a(n-1)

%F k=3: a(n) = 7*a(n-1) +5*a(n-2) +9*a(n-3) -a(n-4) -6*a(n-5)

%F k=4: [order 14]

%F k=5: [order 31]

%F k=6: [order 89]

%e Some solutions for n=5 k=4

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

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

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

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

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

%Y Column 1 is A000079(n-1).

%Y Column 2 is A004171(n-1).

%K nonn,tabl

%O 1,2

%A _R. H. Hardin_, Feb 15 2018

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Last modified April 24 07:05 EDT 2024. Contains 371920 sequences. (Running on oeis4.)