Number of (n+1) X (4+1) 0..2 arrays colored with the upper median value of each 2 X 2 subblock.

Terms

a(0) =2584a(1) =2660a(2) =1780a(3) =2356a(4) =3496a(5) =5036a(6) =7320a(7) =11908a(8) =17592a(9) =25318a(10) =36632a(11) =59508a(12) =87944a(13) =126588a(14) =183160a(15) =297540a(16) =439720a(17) =632940a(18) =915800a(19) =1487700a(20) =2198600a(21) =3164700a(22) =4579000a(23) =7438500a(24) =10993000a(25) =15823500a(26) =22895000a(27) =37192500a(28) =54965000a(29) =79117500