Number of 3 X n 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

A224263

Number of 3 X n 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =10a(1) =100a(2) =648a(3) =3096a(4) =12032a(5) =40182a(6) =119367a(7) =322885a(8) =808618a(9) =1898050a(10) =4215105a(11) =8921265a(12) =18101023a(13) =35375831a(14) =66857059a(15) =122591129a(16) =218705294a(17) =380533212a(18) =647088610a(19) =1077366434a(20) =1759087854a(21) =2820672704a(22) =4447425227a(23) =6903161705a(24) =10558797550a(25) =15929753130a(26) =23724438995a(27) =34906549843

External references