# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a208397 Showing 1-1 of 1 %I A208397 #5 Mar 31 2012 12:37:23 %S A208397 122,88574,53466192,33085555344,20413586117376,12599441934740388, %T A208397 7776176148498498768,4799354153334997638528,2962097148583259021121408, %U A208397 1828166808374593843302307296,1128320137401532221612440868480 %N A208397 Number of 6Xn 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors %C A208397 Row 6 of A208392 %H A208397 R. H. Hardin, Table of n, a(n) for n = 1..210 %F A208397 Empirical: a(n) = 483*a(n-1) +79374*a(n-2) +2325758*a(n-3) -116482840*a(n-4) -4495564268*a(n-5) +111405792720*a(n-6) +2919342926960*a(n-7) -84278449377440*a(n-8) -292603254712096*a(n-9) +29279534769068608*a(n-10) -369555641966430528*a(n-11) +1674749264072678656*a(n-12) +2156486801391239424*a(n-13) -44057404748132724736*a(n-14) +72097583624114731008*a(n-15) +455663058958407811072*a(n-16) -1247507020751283224576*a(n-17) -3007043688407624581120*a(n-18) +9354958262137561546752*a(n-19) +16366237761751490756608*a(n-20) -38560165649886912446464*a(n-21) -74672497584369523752960*a(n-22) +72558930328852457586688*a(n-23) +224968833273366480683008*a(n-24) +41691604839132475424768*a(n-25) -285907224003663252946944*a(n-26) -313784969927732142014464*a(n-27) -101581793844321214005248*a(n-28) +27613799564794291814400*a(n-29) +24843347713795943301120*a(n-30) +2744862767351536287744*a(n-31) -1217400666371817209856*a(n-32) -239668061369775685632*a(n-33) for n>37 %e A208397 Some solutions for n=4 %e A208397 ..0..0..1..0....0..0..0..1....0..1..2..1....0..0..0..0....0..0..1..2 %e A208397 ..1..1..0..0....1..2..2..1....2..0..0..1....0..1..1..2....2..2..1..0 %e A208397 ..2..0..1..0....2..0..1..1....0..2..0..1....0..1..2..1....0..1..2..1 %e A208397 ..0..1..1..0....2..1..2..0....2..0..1..0....2..2..0..0....0..1..0..0 %e A208397 ..0..1..0..2....1..2..0..1....0..2..1..1....0..2..2..0....2..2..0..0 %e A208397 ..2..2..0..1....1..2..0..2....2..0..0..1....0..1..0..1....0..1..0..2 %K A208397 nonn %O A208397 1,1 %A A208397 _R. H. Hardin_ Feb 25 2012 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE