T(n,k) is the number of (n+1) X (k+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7 (constant-stress 1 X 1 tilings).
A234728
T(n,k) is the number of (n+1) X (k+1) 0..7 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) =240a(1) =1096a(2) =1096a(3) =4192a(4) =3976a(5) =4192a(6) =19120a(7) =12464a(8) =12464a(9) =19120a(10) =74496a(11) =48976a(12) =33560a(13) =48976a(14) =74496a(15) =339328a(16) =168928a(17) =116168a(18) =116168a(19) =168928a(20) =339328a(21) =1344640a(22) =692512a(23) =360760a(24) =357208a(25) =360760a(26) =692512a(27) =1344640a(28) =6116416a(29) =2531888
External references
- oeis: A234728