Number of nX6 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.
A223931
Number of nX6 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.
Terms
- a(0) =148a(1) =4690a(2) =49646a(3) =316136a(4) =1548633a(5) =6621074a(6) =26250443a(7) =98910688a(8) =356869229a(9) =1233491661a(10) =4078987936a(11) =12893958739a(12) =38971222534a(13) =112766372283a(14) =313016886779a(15) =835552379045
External references
- oeis: A223931