Number of solid standard Young tableaux of shape [[2*n,2],[2]].

Terms

a(0) =0a(1) =16a(2) =174a(3) =690a(4) =1876a(5) =4140a(6) =7986a(7) =14014a(8) =22920a(9) =35496a(10) =52630a(11) =75306a(12) =104604a(13) =141700a(14) =187866a(15) =244470a(16) =312976a(17) =394944a(18) =492030a(19) =605986a(20) =738660a(21) =891996a(22) =1068034a(23) =1268910a(24) =1496856a(25) =1754200a(26) =2043366a(27) =2366874a(28) =2727340a(29) =3127476