T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median equal to the lower median in every 2X2 subblock.
A235856
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median equal to the lower median in every 2X2 subblock.
Terms
- a(0) =100a(1) =688a(2) =688a(3) =4524a(4) =9600a(5) =4524a(6) =30624a(7) =121244a(8) =121244a(9) =30624a(10) =203804a(11) =1629216a(12) =2848572a(13) =1629216a(14) =203804a(15) =1370656a(16) =21301696a(17) =73075844a(18) =73075844a(19) =21301696a(20) =1370656a(21) =9159084a(22) =283036828a(23) =1811192156a(24) =3725170008a(25) =1811192156a(26) =283036828
External references
- oeis: A235856