Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253986
Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =512a(1) =2736a(2) =11872a(3) =51856a(4) =222400a(5) =914112a(6) =3644672a(7) =14254784a(8) =54856896a(9) =208045808a(10) =779267488a(11) =2888373904a(12) =10608724864a(13) =38652879616a(14) =139832334592a(15) =502668749632
External references
- oeis: A253986