# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a263872 Showing 1-1 of 1 %I A263872 #4 Oct 28 2015 11:49:47 %S A263872 5,5,25,41,494,2909,62904,525967,8468941,71260394,850301770, %T A263872 6589670154,62160939006,434482926964,3416830587073,21593530137906, %U A263872 146883022822593,846348872934578,5108443008090443,27076148532186899,147708619212786406 %N A263872 Number of (n+1)X(7+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nondecreasing. %C A263872 Column 7 of A263873. %H A263872 R. H. Hardin, Table of n, a(n) for n = 1..60 %e A263872 Some solutions for n=4 %e A263872 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A263872 ..0..0..1..1..1..1..1..1....0..0..0..0..1..1..1..1....0..0..0..0..0..0..0..0 %e A263872 ..0..0..1..1..1..1..1..1....0..0..0..0..1..1..1..1....0..0..0..0..0..0..0..0 %e A263872 ..1..1..0..0..0..0..0..0....1..1..1..1..1..1..1..1....0..0..0..0..0..0..1..1 %e A263872 ..1..1..0..0..0..0..0..0....1..1..1..1..1..1..1..1....0..0..0..0..0..0..1..1 %Y A263872 Cf. A263873. %K A263872 nonn %O A263872 1,1 %A A263872 _R. H. Hardin_, Oct 28 2015 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE