Number of 7 X n 0..1 arrays with rows nondecreasing and antidiagonals unimodal.

Terms

a(0) =128a(1) =2187a(2) =9688a(3) =25047a(4) =52581a(5) =101412a(6) =186348a(7) =329167a(8) =561329a(9) =927323a(10) =1488515a(11) =2327716a(12) =3554534a(13) =5311574a(14) =7781550a(15) =11195373a(16) =15841279a(17) =22075061a(18) =30331469a(19) =41136842a(20) =55123036a(21) =73042712a(22) =95786048a(23) =124398939a(24) =160102749a(25) =204315679