Number of nX4 0..1 arrays with row sums nondecreasing and column sums unimodal.
A223622
Number of nX4 0..1 arrays with row sums nondecreasing and column sums unimodal.
Terms
- a(0) =11a(1) =98a(2) =751a(3) =5303a(4) =35413a(5) =228401a(6) =1437511a(7) =8898472a(8) =54437857a(9) =330381980a(10) =1993659689a(11) =11985196268a(12) =71858499637a(13) =430123654878
External references
- oeis: A223622