Number of n X 4 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

A223914

Number of n X 4 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =46a(1) =548a(2) =3311a(3) =14123a(4) =48182a(5) =139925a(6) =359344a(7) =837243a(8) =1802306a(9) =3633256a(10) =6929795a(11) =12606425a(12) =22013660a(13) =37091549a(14) =60560840a(15) =96157525a(16) =148916916a(17) =225513812a(18) =334665727a(19) =487606559a(20) =698638490a(21) =985770317a(22) =1371450824a(23) =1883406215

External references