Number of nX3 0..5 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
A201137
Number of nX3 0..5 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
Terms
- a(0) =20a(1) =5a(2) =402a(3) =117a(4) =5252a(5) =758a(6) =35810a(7) =4788a(8) =182640a(9) =18486a(10) =743288a(11) =78155a(12) =2551706a(13) =217720a(14) =7481114a(15) =653018a(16) =20218442a(17) =1605125a(18) =49306390a(19) =3853884a(20) =111522844a(21) =8139750a(22) =238718470a(23) =17696623a(24) =483325794a(25) =33393124a(26) =928163494a(27) =64732125
External references
- oeis: A201137