Number of nX2 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor.
A203544
Number of nX2 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor.
Terms
- a(0) =1a(1) =25a(2) =430a(3) =4773a(4) =48046a(5) =504464a(6) =5448482a(7) =58647145a(8) =627364147a(9) =6706865204a(10) =71775620385a(11) =768373504745
External references
- oeis: A203544