Number of nX6 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

A223916

Number of nX6 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =148a(1) =4102a(2) =45988a(3) =323394a(4) =1721356a(5) =7526024a(6) =28247478a(7) =93683295a(8) =280338123a(9) =769012348a(10) =1958026231a(11) =4673735444a(12) =10543684618a(13) =22631328296a(14) =46477583300a(15) =91756934105a(16) =174838318505a(17) =322648096420a(18) =578369211133

External references