Number of nX6 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317821
Number of nX6 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =511a(2) =1113a(3) =11768a(4) =47374a(5) =296968a(6) =1458418a(7) =8231398a(8) =43470698a(9) =234869539a(10) =1268932863a(11) =6796211640a(12) =36769146540a(13) =197424396019
External references
- oeis: A317821