Number of nX3 binary arrays with each element equal to either the sum mod 2 of its horizontal and vertical neighbors or the sum mod 2 of its diagonal and antidiagonal neighbors.
A183511
Number of nX3 binary arrays with each element equal to either the sum mod 2 of its horizontal and vertical neighbors or the sum mod 2 of its diagonal and antidiagonal neighbors.
Terms
- a(0) =3a(1) =11a(2) =37a(3) =138a(4) =427a(5) =1444a(6) =4903a(7) =16506a(8) =55852a(9) =187749a(10) =633539a(11) =2137749a(12) =7207808a(13) =24313464a(14) =81989501a(15) =276535047a(16) =932671520a(17) =3145519293a(18) =10608869096a(19) =35779805168a(20) =120673337749a(21) =406989614355
External references
- oeis: A183511