Number of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant-stress 1 X 1 tilings).
A235271
Number of (n+1) X (1+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5 (constant-stress 1 X 1 tilings).
Terms
- a(0) =40a(1) =100a(2) =208a(3) =520a(4) =1120a(5) =2800a(6) =6208a(7) =15520a(8) =35200a(9) =88000a(10) =203008a(11) =507520a(12) =1185280a(13) =2963200a(14) =6980608a(15) =17451520a(16) =41359360a(17) =103398400a(18) =246059008a(19) =615147520a(20) =1467965440a(21) =3669913600a(22) =8774238208a(23) =21935595520a(24) =52511211520a(25) =131278028800
External references
- oeis: A235271