cp's OEIS Frontend

A203610 T(n,k)=Number of nXk 0,1 arrays with adjacent row and column sums unequal.

%I A203610 #7 Jul 22 2025 17:23:19
%S A203610 2,2,2,2,8,2,2,20,20,2,2,44,126,44,2,2,116,728,728,116,2,2,332,4374,
%T A203610 10016,4374,332,2,2,900,25788,129656,129656,25788,900,2,2,2268,149794,
%U A203610 1649668,3648810,1649668,149794,2268,2,2,5716,866692,20742920,98676048
%N A203610 T(n,k)=Number of nXk 0,1 arrays with adjacent row and column sums unequal.
%C A203610 Table starts
%C A203610 .2.....2........2...........2..............2...............2................2
%C A203610 .2.....8.......20..........44............116.............332..............900
%C A203610 .2....20......126.........728...........4374...........25788...........149794
%C A203610 .2....44......728.......10016.........129656.........1649668.........20742920
%C A203610 .2...116.....4374......129656........3648810........98676048.......2608783126
%C A203610 .2...332....25788.....1649668.......98676048......5616280768.....310153746516
%C A203610 .2...900...149794....20742920.....2608783126....310153746516...35610018145138
%C A203610 .2..2268...866692...256903112....67877862300..16801526882832.3993667091848452
%C A203610 .2..5716..4989242..3151779352..1746486947416.897690327775816
%C A203610 .2.14892.28600208.38451720324.44565435574244
%H A203610 R. H. Hardin, <a href="/A203610/b203610.txt">Table of n, a(n) for n = 1..111</a>
%e A203610 Some solutions for 4X4
%e A203610 ..0..0..0..1....1..0..0..0....1..1..1..0....0..1..1..0....0..0..1..1
%e A203610 ..0..0..1..1....0..1..1..0....1..0..1..0....1..1..0..1....0..0..0..1
%e A203610 ..0..1..0..0....1..0..1..1....0..0..0..1....1..0..0..0....0..0..0..0
%e A203610 ..0..1..0..1....1..1..1..1....1..0..1..0....1..0..0..1....1..0..0..0
%Y A203610 Diagonal is A202648
%K A203610 nonn,tabl
%O A203610 1,1
%A A203610 _R. H. Hardin_ Jan 03 2012