Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.
A240323
Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.
Terms
- a(0) =4a(1) =17a(2) =116a(3) =455a(4) =1677a(5) =8091a(6) =28448a(7) =117304a(8) =513841a(9) =1871262a(10) =7963314a(11) =32859835a(12) =125032724a(13) =531287384a(14) =2129046798a(15) =8380565700a(16) =35092450158a(17) =139319279619a(18) =559869375850
External references
- oeis: A240323