Number of (n+1) X (3+1) 0..2 arrays colored with the upper median value of each 2 X 2 subblock.

Terms

a(0) =905a(1) =1372a(2) =1494a(3) =1780a(4) =2478a(5) =3504a(6) =4884a(7) =6888a(8) =9816a(9) =13920a(10) =19554a(11) =27600a(12) =39296a(13) =55680a(14) =78216a(15) =110400a(16) =157184a(17) =222720a(18) =312864a(19) =441600a(20) =628736a(21) =890880a(22) =1251456a(23) =1766400a(24) =2514944a(25) =3563520a(26) =5005824a(27) =7065600a(28) =10059776a(29) =14254080