Number of (n+1)X(6+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
A253324
Number of (n+1)X(6+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
Terms
- a(0) =1482a(1) =6936a(2) =31999a(3) =66196a(4) =173903a(5) =283804a(6) =600020a(7) =952108a(8) =1887609a(9) =3123964a(10) =6138900a(11) =10795040a(12) =21356925a(13) =39547774a(14) =78761338a(15) =150942126a(16) =301625253a(17) =589680938a(18) =1179726447a(19) =2331440768a(20) =4665269359a(21) =9272462376a(22) =18552625342
External references
- oeis: A253324