Number of nX4 0..2 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.
A201428
Number of nX4 0..2 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.
Terms
- a(0) =3a(1) =76a(2) =622a(3) =33740a(4) =561271a(5) =2740779a(6) =96745050a(7) =1042095316a(8) =3442865393a(9) =88529711419a(10) =713489134252
External references
- oeis: A201428