Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.
A278722
Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.
Terms
- a(0) =20a(1) =275a(2) =3232a(3) =33466a(4) =306070a(5) =2487889a(6) =18151220a(7) =120104810a(8) =727684612a(9) =4070893254a(10) =21181152380a(11) =103146867706a(12) =472709673984
External references
- oeis: A278722