# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a242583 Showing 1-1 of 1 %I A242583 #4 May 17 2014 19:21:19 %S A242583 14,46,175,745,3482,17670,96472,562109,3469255,22511261,152416564, %T A242583 1068885011,7711216523,56883599674,426892077104,3245855512924, %U A242583 24923815228380,192793238658181,1499479762818409,11709699180354092 %N A242583 Number of length n+3 0..7 arrays with no four elements in a row with pattern aabb (with a!=b) and new values 0..7 introduced in 0..7 order %C A242583 Column 7 of A242584 %H A242583 R. H. Hardin, Table of n, a(n) for n = 1..210 %F A242583 Empirical: a(n) = 29*a(n-1) -365*a(n-2) +2751*a(n-3) -14728*a(n-4) +62166*a(n-5) -215704*a(n-6) +627128*a(n-7) -1562623*a(n-8) +3360115*a(n-9) -6247103*a(n-10) +10125897*a(n-11) -14168297*a(n-12) +17087259*a(n-13) -17667849*a(n-14) +15155431*a(n-15) -10856310*a(n-16) +6024124*a(n-17) -2417520*a(n-18) +705600*a(n-19) %e A242583 Some solutions for n=4 %e A242583 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0 %e A242583 ..1....1....1....0....1....1....0....0....1....1....0....1....1....1....1....1 %e A242583 ..0....1....1....1....2....2....1....1....2....2....1....2....2....2....1....2 %e A242583 ..0....0....0....2....3....0....0....0....1....0....2....2....0....2....0....2 %e A242583 ..2....2....2....1....4....1....1....2....0....1....0....1....0....2....1....3 %e A242583 ..3....3....0....1....5....1....0....0....3....3....2....2....2....2....0....1 %e A242583 ..3....3....3....2....4....2....2....1....3....4....0....1....3....0....0....3 %K A242583 nonn %O A242583 1,1 %A A242583 _R. H. Hardin_, May 17 2014 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE