Number of nX2 0..3 arrays with each element equal to either the sum mod 4 of its horizontal and vertical neighbors or the sum mod 4 of its diagonal and antidiagonal neighbors.
A183536
Number of nX2 0..3 arrays with each element equal to either the sum mod 4 of its horizontal and vertical neighbors or the sum mod 4 of its diagonal and antidiagonal neighbors.
Terms
- a(0) =4a(1) =16a(2) =43a(3) =128a(4) =416a(5) =1287a(6) =3996a(7) =12594a(8) =39539a(9) =123964a(10) =390822a(11) =1231115a(12) =3878694a(13) =12237024a(14) =38612549a(15) =121853840a(16) =384703976a(17) =1214725443a(18) =3835937346a(19) =12115116500a(20) =38266545975a(21) =120874923256a(22) =381838415718
External references
- oeis: A183536