cp's OEIS Frontend

A207885 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 1 0 vertically.

%I A207885 #7 Jul 22 2025 20:55:54
%S A207885 2,4,4,6,16,6,9,36,36,9,13,81,82,81,14,19,169,221,177,196,22,28,361,
%T A207885 493,575,408,484,35,41,784,1095,1360,1673,942,1225,56,60,1681,2654,
%U A207885 3106,4387,4881,2233,3136,90,88,3600,6203,8652,10207,14225,14825,5348,8100,145,129
%N A207885 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 1 0 vertically.
%C A207885 Table starts
%C A207885 ..2....4....6.....9.....13.....19......28.......41.......60........88.......129
%C A207885 ..4...16...36....81....169....361.....784.....1681.....3600......7744.....16641
%C A207885 ..6...36...82...221....493...1095....2654.....6203....14182.....33242.....77781
%C A207885 ..9...81..177...575...1360...3106....8652....22114....53620....139806....360132
%C A207885 .14..196..408..1673...4387..10207...33976....97989...250976....751786...2196861
%C A207885 .22..484..942..4881..14225..33631..138552...452415..1213630...4316538..14467167
%C A207885 .35.1225.2233.14825..49586.119278..618202..2332602..6535778..28238814.110355600
%C A207885 .56.3136.5348.45411.175747.430317.2857532.12501427.36429646.195734448.894867543
%H A207885 R. H. Hardin, <a href="/A207885/b207885.txt">Table of n, a(n) for n = 1..578</a>
%e A207885 Some solutions for n=4 k=3
%e A207885 ..1..1..1....0..1..0....0..1..1....0..0..1....0..1..0....0..0..1....1..0..0
%e A207885 ..1..1..1....1..0..0....1..1..0....0..1..1....1..1..1....1..1..0....0..0..1
%e A207885 ..1..1..1....0..1..1....0..1..1....0..0..1....0..1..0....0..0..1....1..1..0
%e A207885 ..1..1..1....1..0..0....1..1..0....1..1..1....0..1..0....1..0..0....0..0..1
%Y A207885 Column 1 is A001611(n+2)
%Y A207885 Column 2 is A207436
%Y A207885 Column 3 is A207483
%Y A207885 Row 1 is A000930(n+3)
%Y A207885 Row 2 is A207170
%Y A207885 Row 3 is A207763
%K A207885 nonn,tabl
%O A207885 1,1
%A A207885 _R. H. Hardin_ Feb 21 2012