T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.
A206974
T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.
Terms
- a(0) =4a(1) =16a(2) =16a(3) =61a(4) =256a(5) =61a(6) =232a(7) =3721a(8) =3721a(9) =232a(10) =882a(11) =53824a(12) =180294a(13) =53824a(14) =882a(15) =3353a(16) =777924a(17) =8685113a(18) =8688551a(19) =777924a(20) =3353a(21) =12747a(22) =11242609a(23) =419203246a(24) =1391081032a(25) =417476451a(26) =11242609a(27) =12747a(28) =48460a(29) =162486009
External references
- oeis: A206974