T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21.

A233875

T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21.

Terms

    a(0) =224a(1) =1176a(2) =1176a(3) =5984a(4) =5404a(5) =5984a(6) =34416a(7) =26488a(8) =26488a(9) =34416a(10) =189632a(11) =155104a(12) =139880a(13) =155104a(14) =189632a(15) =1128928a(16) =909408a(17) =907940a(18) =907940a(19) =909408a(20) =1128928a(21) =6414208a(22) =5878272a(23) =6146640a(24) =6887232a(25) =6146640a(26) =5878272a(27) =6414208a(28) =38622656

External references