Number of n X 4 0..1 arrays with rows, columns, diagonals and antidiagonals unimodal.

Terms

a(0) =11a(1) =121a(2) =726a(3) =2962a(4) =9808a(5) =28450a(6) =74599a(7) =179991a(8) =404599a(9) =855417a(10) =1714062a(11) =3275798a(12) =6002946a(13) =10596004a(14) =18086161a(15) =29953249a(16) =48273537a(17) =75902131a(18) =116695104a(19) =175776840a(20) =259858436a(21) =377613366a(22) =540116971a(23) =761356699a(24) =1058820379a(25) =1454170173