Number of (n+1) X (n+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
A250575
Number of (n+1) X (n+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
Terms
- a(0) =10a(1) =60a(2) =336a(3) =1776a(4) =8914a(5) =43202a(6) =203560a(7) =939730a(8) =4266332a(9) =19120668a(10) =84774066a(11) =372587962a(12) =1625370614a(13) =7046239064a(14) =30380655534a(15) =130376624746a(16) =557189663232
External references
- oeis: A250575