Number of nX6 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317900
Number of nX6 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =9a(2) =4a(3) =54a(4) =75a(5) =167a(6) =502a(7) =2064a(8) =5877a(9) =17008a(10) =53512a(11) =175313a(12) =540037a(13) =1715436a(14) =5431253a(15) =17142134a(16) =54068313a(17) =171199743a(18) =541229806a(19) =1711178754a(20) =5411163506a(21) =17113807354a(22) =54113456322a(23) =171137431243a(24) =541218521011
External references
- oeis: A317900