Number of nX3 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318063
Number of nX3 0..1 arrays with every element unequal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =18a(2) =98a(3) =649a(4) =4003a(5) =25106a(6) =156846a(7) =980960a(8) =6133497a(9) =38352691a(10) =239814461a(11) =1499536299a(12) =9376441731a(13) =58629916469a(14) =366606748842
External references
- oeis: A318063