T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
A210300
T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference.
Terms
- a(0) =112a(1) =1578a(2) =1578a(3) =22212a(4) =78628a(5) =22212a(6) =312704a(7) =3913002a(8) =3913002a(9) =312704a(10) =4402192a(11) =194768054a(12) =688122928a(13) =194768054a(14) =4402192a(15) =61973516a(16) =9694276684a(17) =121040117840a(18) =121040117840a(19) =9694276684a(20) =61973516a(21) =872455004a(22) =482519042626
External references
- oeis: A210300