Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
A235254
Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).
Terms
- a(0) =10820a(1) =30300a(2) =80812a(3) =247368a(4) =717452a(5) =2337832a(6) =7200188a(7) =24526880a(8) =79038828a(9) =278130808a(10) =928595228a(11) =3348693040a(12) =11501925612a(13) =42273509096a(14) =148589755644a(15) =554433956880
External references
- oeis: A235254