T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences.
A210355
T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences.
Terms
- a(0) =40a(1) =431a(2) =431a(3) =4615a(4) =13566a(5) =4615a(6) =49484a(7) =423694a(8) =423694a(9) =49484a(10) =530580a(11) =13288986a(12) =38415623a(13) =13288986a(14) =530580a(15) =5689274a(16) =416960476a(17) =3506487749a(18) =3506487749a(19) =416960476a(20) =5689274a(21) =61005068a(22) =13085817650a(23) =320128196268a(24) =934012605398
External references
- oeis: A210355