T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock.
A235981
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock.
Terms
- a(0) =39a(1) =181a(2) =181a(3) =815a(4) =1473a(5) =815a(6) =3741a(7) =11239a(8) =11239a(9) =3741a(10) =16999a(11) =89555a(12) =143183a(13) =89555a(14) =16999a(15) =77701a(16) =703565a(17) =1947197a(18) =1947197a(19) =703565a(20) =77701a(21) =354015a(22) =5579529a(23) =26090277a(24) =46727365a(25) =26090277a(26) =5579529a(27) =354015a(28) =1615917a(29) =44112111
External references
- oeis: A235981