Number of 6Xn 0..1 arrays with rows unimodal and antidiagonals nondecreasing.

Terms

a(0) =64a(1) =972a(2) =4636a(3) =13440a(4) =31710a(5) =68282a(6) =139638a(7) =275766a(8) =530583a(9) =999049a(10) =1844709a(11) =3342831a(12) =5946316a(13) =10384152a(14) =17805490a(15) =29986574a(16) =49622914a(17) =80735424a(18) =129226948a(19) =203634878a(20) =316136662a(21) =483878162a(22) =730710330a(23) =1089437826a(24) =1604704333