Number of 3Xn arrays containing n copies of 0..3-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0.
A265657
Number of 3Xn arrays containing n copies of 0..3-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0.
Terms
- a(0) =1a(1) =7a(2) =20a(3) =104a(4) =476a(5) =2428a(6) =12362a(7) =64454a(8) =342054a(9) =1828533a(10) =9928762a(11) =54157257a(12) =298686238a(13) =1653956425a(14) =9228016750a(15) =51675269021a(16) =290902199460
External references
- oeis: A265657