Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
A234262
Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).
Terms
- a(0) =244a(1) =358a(2) =560a(3) =988a(4) =1816a(5) =3616a(6) =7304a(7) =15544a(8) =33064a(9) =73288a(10) =161000a(11) =367528a(12) =826216a(13) =1930216a(14) =4416104a(15) =10507624a(16) =24366184a(17) =58801768a(18) =137742440a(19) =335934568a(20) =792768616a(21) =1948301416a(22) =4622131304a(23) =11420979304a(24) =27195392104a(25) =67451347048
External references
- oeis: A234262