# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a187940 Showing 1-1 of 1 %I A187940 #5 Mar 31 2012 12:36:10 %S A187940 48,44,44,304,104,304,784,704,704,784,3188,2532,7616,2532,3188,10296, %T A187940 14308,50802,50802,14308,10296,38020,64024,435194,544222,435194,64024, %U A187940 38020,131184,328116,3394156,7443374,7443374,3394156,328116,131184 %N A187940 T(n,k)=Number of (n+2)X(k+2) binary arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum %C A187940 Table starts %C A187940 ......48......44.......304........784.......3188......10296.......38020 %C A187940 ......44.....104.......704.......2532......14308......64024......328116 %C A187940 .....304.....704......7616......50802.....435194....3394156....27734942 %C A187940 .....784....2532.....50802.....544222....7443374...94215422..1239704056 %C A187940 ....3188...14308....435194....7443374..167909728.3490809390.75359054474 %C A187940 ...10296...64024...3394156...94215422.3490809390 %C A187940 ...38020..328116..27734942.1239704056 %C A187940 ..131184.1509288.222519352 %C A187940 ..470896.7610052 %C A187940 .1657548 %H A187940 R. H. Hardin, Table of n, a(n) for n = 1..60 %e A187940 Some solutions for 5X4 %e A187940 ..0..1..0..1....1..0..1..0....1..0..1..1....1..0..1..0....1..0..1..0 %e A187940 ..0..1..0..1....0..0..0..0....0..1..0..0....1..1..1..1....0..0..0..0 %e A187940 ..0..1..0..1....0..1..0..1....1..0..1..1....0..1..0..1....1..0..1..0 %e A187940 ..0..1..1..1....1..1..1..1....0..1..1..1....1..1..1..1....0..0..0..0 %e A187940 ..1..1..0..1....1..0..1..0....1..1..1..0....1..0..1..0....0..1..0..1 %K A187940 nonn,tabl %O A187940 1,1 %A A187940 _R. H. Hardin_ Mar 16 2011 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE