Number of nX3 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.
A267662
Number of nX3 0..1 arrays with every repeated value in every row unequal to the previous repeated value, and in every column equal to the previous repeated value, and new values introduced in row-major sequential order.
Terms
- a(0) =3a(1) =18a(2) =108a(3) =453a(4) =1800a(5) =6654a(6) =23967a(7) =84552a(8) =295176a(9) =1023321a(10) =3533484a(11) =12170886a(12) =41859891a(13) =143844024a(14) =494032074a(15) =1696231551a(16) =5822855280a(17) =19986766938a(18) =68599945065a(19) =235446171408a(20) =808076493654
External references
- oeis: A267662