T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
A238311
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =256a(1) =1776a(2) =1776a(3) =12372a(4) =20128a(5) =12372a(6) =85984a(7) =227622a(8) =227622a(9) =85984a(10) =601408a(11) =2570594a(12) =4124382a(13) =2570594a(14) =601408a(15) =4181152a(16) =29039618a(17) =73547936a(18) =73547936a(19) =29039618a(20) =4181152a(21) =29228452a(22) =328887234a(23) =1325192097a(24) =2095353404a(25) =1325192097
External references
- oeis: A238311