Number of nX6 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

A223768

Number of nX6 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

Terms

    a(0) =22a(1) =169a(2) =607a(3) =1601a(4) =3699a(5) =8007a(6) =16742a(7) =34096a(8) =67890a(9) =132115a(10) =251110a(11) =465910a(12) =843960a(13) =1493505a(14) =2584666a(15) =4379914a(16) =7277630a(17) =11873716a(18) =19047873a(19) =30083272a(20) =46831011a(21) =71934087a(22) =109129744a(23) =163654129a(24) =242779358a(25) =356520541a(26) =518559236a(27) =747440414

External references