Number of n X n 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing.

A223771

Number of n X n 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing.

Terms

    a(0) =2a(1) =12a(2) =78a(3) =461a(4) =2516a(5) =12975a(6) =64256a(7) =308895a(8) =1451996a(9) =6707709a(10) =30563338a(11) =137715999a(12) =614855772a(13) =2724027619

External references