This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A282647 #4 Feb 20 2017 07:33:23 %S A282647 2,4,4,7,11,7,13,27,27,13,24,76,99,76,24,44,201,413,413,201,44,81,537, %T A282647 1601,2638,1601,537,81,149,1444,6349,15460,15460,6349,1444,149,274, %U A282647 3859,25153,92817,133118,92817,25153,3859,274,504,10339,99287,557439,1190848 %N A282647 T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than one of its king-move neighbors. %C A282647 Table starts %C A282647 ...2.....4.......7........13.........24...........44.............81 %C A282647 ...4....11......27........76........201..........537...........1444 %C A282647 ...7....27......99.......413.......1601.........6349..........25153 %C A282647 ..13....76.....413......2638......15460........92817.........557439 %C A282647 ..24...201....1601.....15460.....133118......1190848.......10614316 %C A282647 ..44...537....6349.....92817....1190848.....15985259......213392087 %C A282647 ..81..1444...25153....557439...10614316....213392087.....4257307148 %C A282647 .149..3859...99287...3332685...94161619...2835418176....84514081303 %C A282647 .274.10339..392907..19979228..838433062..37825158151..1685475197497 %C A282647 .504.27692.1553391.119669673.7454215075.503735487244.33544066527869 %H A282647 R. H. Hardin, <a href="/A282647/b282647.txt">Table of n, a(n) for n = 1..364</a> %F A282647 Empirical for column k: %F A282647 k=1: a(n) = a(n-1) +a(n-2) +a(n-3) %F A282647 k=2: a(n) = a(n-1) +3*a(n-2) +4*a(n-3) %F A282647 k=3: a(n) = 2*a(n-1) +6*a(n-2) +8*a(n-3) -5*a(n-4) +2*a(n-5) -2*a(n-6) %F A282647 k=4: [order 9] %F A282647 k=5: [order 21] %F A282647 k=6: [order 30] %F A282647 k=7: [order 66] %e A282647 Some solutions for n=4 k=4 %e A282647 ..0..0..0..1. .0..0..0..0. .1..0..0..1. .0..1..0..0. .0..1..0..0 %e A282647 ..0..1..0..1. .1..0..1..0. .0..1..0..1. .0..0..0..0. .0..0..0..1 %e A282647 ..1..0..0..0. .0..0..1..0. .0..0..0..0. .1..0..0..1. .0..0..0..1 %e A282647 ..0..0..0..0. .1..0..0..0. .0..1..0..0. .1..0..0..0. .1..0..0..0 %Y A282647 Column 1 is A000073(n+3). %K A282647 nonn,tabl %O A282647 1,1 %A A282647 _R. H. Hardin_, Feb 20 2017