Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
A241303
Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
Terms
- a(0) =6a(1) =25a(2) =74a(3) =330a(4) =1145a(5) =4499a(6) =15827a(7) =58043a(8) =209838a(9) =757771a(10) =2745263a(11) =9924295a(12) =35873441a(13) =129961622a(14) =469870606a(15) =1700617363a(16) =6154480549a(17) =22269120491a(18) =80588613827a(19) =291628152979
External references
- oeis: A241303