Number of nX6 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.
A223862
Number of nX6 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing.
Terms
- a(0) =610a(1) =52591a(2) =1477240a(3) =22852913a(4) =243933798a(5) =1989679315a(6) =13140481520a(7) =73068868012a(8) =352040804450
External references
- oeis: A223862