Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A258546
Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =16a(1) =112a(2) =598a(3) =1891a(4) =5070a(5) =10854a(6) =21653a(7) =38451a(8) =64507a(9) =100830a(10) =153641a(11) =223684a(12) =317754a(13) =436768a(14) =592439a(15) =784607a(16) =1024843a(17) =1313644a(18) =1669887a(19) =2091844a(20) =2597102a(21) =3185410a(22) =3884481a(23) =4690355a(24) =5627875a(25) =6695714a(26) =7932093a(27) =9330156a(28) =10923242
External references
- oeis: A258546