Number of (n+1) X (4+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).
A235315
Number of (n+1) X (4+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).
Terms
- a(0) =3920a(1) =8392a(2) =16352a(3) =40144a(4) =89600a(5) =241600a(6) =598976a(7) =1723456a(8) =4616960a(9) =13917952a(10) =39447872a(11) =123109504a(12) =363776000a(13) =1165742080a(14) =3555169856a(15) =11629123456a(16) =36344940800a(17) =120802796032a(18) =384900713792
External references
- oeis: A235315