Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.
A186559
Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.
Terms
- a(0) =19683a(1) =173a(2) =1399a(3) =8983a(4) =21007a(5) =29935a(6) =47719a(7) =82783a(8) =168391a(9) =441199a(10) =1129591a(11) =2679679a(12) =6669991a(13) =15566383a(14) =34790167a(15) =83037151a(16) =194778055a(17) =446546575a(18) =1070609527a(19) =2528845759a(20) =5841194023a(21) =13884206959a(22) =32712096727a(23) =75846181663
External references
- oeis: A186559