Number of nXn 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317808
Number of nXn 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =7a(4) =38a(5) =142a(6) =1575a(7) =13712a(8) =112854a(9) =1446948a(10) =21089268a(11) =358570823a(12) =7306257506
External references
- oeis: A317808