Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
A253377
Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
Terms
- a(0) =2500a(1) =22631a(2) =219438a(3) =2000385a(4) =17316309a(5) =128407497a(6) =912012350a(7) =5602735678a(8) =33436453693a(9) =176885943216a(10) =917401073689
External references
- oeis: A253377