T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the upper median plus the lower median of every 2 X 2 subblock equal.

A237007

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with the upper median plus the lower median of every 2 X 2 subblock equal.

Terms

    a(0) =256a(1) =1200a(2) =1200a(3) =5288a(4) =10000a(5) =5288a(6) =26320a(7) =79164a(8) =79164a(9) =26320a(10) =131280a(11) =762724a(12) =1150036a(13) =762724a(14) =131280a(15) =677344a(16) =7370124a(17) =22056220a(18) =22056220a(19) =7370124a(20) =677344a(21) =3518120a(22) =74701920a(23) =411646536a(24) =880923796a(25) =411646536a(26) =74701920a(27) =3518120

External references