T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
A237927
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =256a(1) =1632a(2) =1632a(3) =10316a(4) =15260a(5) =10316a(6) =66512a(7) =142488a(8) =142488a(9) =66512a(10) =431640a(11) =1365710a(12) =1926461a(13) =1365710a(14) =431640a(15) =2776536a(16) =13009850a(17) =26467386a(18) =26467386a(19) =13009850a(20) =2776536a(21) =17920936a(22) =123407764a(23) =362996768a(24) =533139326a(25) =362996768
External references
- oeis: A237927