Number of 7Xn 0..1 arrays with rows unimodal and columns nondecreasing.

Terms

a(0) =8a(1) =64a(2) =372a(3) =1716a(4) =6672a(5) =22716a(6) =69498a(7) =194634a(8) =505912a(9) =1233584a(10) =2845492a(11) =6251596a(12) =13154948a(13) =26635774a(14) =52097267a(15) =98759971a(16) =181971248a(17) =326703424a(18) =572756312a(19) =982365976a(20) =1651162688a(21) =2723729944a(22) =4415408372a(23) =7042481236a(24) =11063492816