Number of n X 4 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

A223766

Number of n X 4 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

Terms

    a(0) =11a(1) =56a(2) =155a(3) =361a(4) =782a(5) =1601a(6) =3141a(7) =5907a(8) =10678a(9) =18618a(10) =31422a(11) =51505a(12) =82243a(13) =128276a(14) =195884a(15) =293448a(16) =432009a(17) =625939a(18) =893739a(19) =1258980a(20) =1751404a(21) =2408203a(22) =3275495a(23) =4410017a(24) =5881056a(25) =7772640a(26) =10186012a(27) =13242411a(28) =17086185a(29) =21888262

External references