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 one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.
A239596
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 one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.
Terms
- a(0) =24a(1) =64a(2) =187a(3) =643a(4) =1737a(5) =7461a(6) =24946a(7) =78667a(8) =313003a(9) =946740a(10) =3353070a(11) =11758390a(12) =36733281a(13) =134840254a(14) =447239565a(15) =1494320065a(16) =5328884020a(17) =17359223415a(18) =60336682303a(19) =207461258909a(20) =687759739866
External references
- oeis: A239596