Number of (n+1) X (7+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
A235288
Number of (n+1) X (7+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
Terms
- a(0) =836a(1) =968a(2) =1108a(3) =1400a(4) =1724a(5) =2408a(6) =3220a(7) =4952a(8) =7196a(9) =12008a(10) =18868a(11) =33560a(12) =56444a(13) =105128a(14) =186580a(15) =358232a(16) =660956a(17) =1292648a(18) =2448628a(19) =4839320a(20) =9327164a(21) =18539048a(22) =36139540a(23) =72049112a(24) =141513116a(25) =282566888a(26) =557838388a(27) =1114758680a(28) =2208549884
External references
- oeis: A235288