T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
A237557
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =81a(1) =312a(2) =312a(3) =1240a(4) =1668a(5) =1240a(6) =4752a(7) =8764a(8) =8764a(9) =4752a(10) =19128a(11) =44668a(12) =60002a(13) =44668a(14) =19128a(15) =72736a(16) =224948a(17) =343356a(18) =343356a(19) =224948a(20) =72736a(21) =290112a(22) =1181206a(23) =2403292a(24) =3207808a(25) =2403292a(26) =1181206a(27) =290112a(28) =1110080a(29) =6170564
External references
- oeis: A237557