Number of (n+1)X(2+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.
A235567
Number of (n+1)X(2+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.
Terms
- a(0) =50a(1) =250a(2) =1120a(3) =4670a(4) =18606a(5) =71710a(6) =270016a(7) =998834a(8) =3646406a(9) =13176346a(10) =47242048a(11) =168350870a(12) =597109486a(13) =2110060262a(14) =7435237264a(15) =26141362890a(16) =91751051238a(17) =321596169218
External references
- oeis: A235567