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A298055 T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero. 7

%I

%S 0,1,1,1,3,1,2,7,7,2,3,13,15,13,3,5,23,19,19,23,5,8,49,23,40,23,49,8,

%T 13,95,34,73,73,34,95,13,21,177,63,141,121,141,63,177,21,34,359,96,

%U 240,231,231,240,96,359,34,55,705,147,428,422,512,422,428,147,705,55,89,1351,233

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

%C Table starts

%C ..0...1...1...2....3....5....8....13....21....34.....55.....89....144.....233

%C ..1...3...7..13...23...49...95...177...359...705...1351...2689...5303...10321

%C ..1...7..15..19...23...34...63....96...147...233....368....588....933....1500

%C ..2..13..19..40...73..141..240...428...779..1531...2989...5729..10760...20205

%C ..3..23..23..73..121..231..422...865..1729..3286...6319..12563..24164...46151

%C ..5..49..34.141..231..512..780..1577..3162..6228..12289..24231..47917...95955

%C ..8..95..63.240..422..780.1708..3362..6794.14943..29523..61474.128150..264417

%C .13.177..96.428..865.1577.3362..7014.15247.34464..71665.153171.337793..727538

%C .21.359.147.779.1729.3162.6794.15247.35804.81453.182350.407843.937627.2114521

%H R. H. Hardin, <a href="/A298055/b298055.txt">Table of n, a(n) for n = 1..337</a>

%F Empirical for column k:

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

%F k=2: a(n) = 3*a(n-1) -2*a(n-2) +4*a(n-3) -10*a(n-4) +4*a(n-5) for n>6

%F k=3: [order 18] for n>19

%F k=4: [order 72] for n>73

%e Some solutions for n=5 k=4

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

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

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

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

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

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

%Y Column 2 is A297852.

%K nonn,tabl

%O 1,5

%A _R. H. Hardin_, Jan 11 2018

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Last modified May 25 19:19 EDT 2022. Contains 354071 sequences. (Running on oeis4.)