Number of nX3 0..7 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

A201096

Number of nX3 0..7 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) =56a(1) =140a(2) =252a(3) =10423a(4) =6972a(5) =85005a(6) =478198a(7) =27782a(8) =3937944a(9) =5383954a(10) =3924198a(11) =71618507a(12) =17686966a(13) =130532978a(14) =548361638a(15) =21099296a(16) =2051973940a(17) =1828355516a(18) =936392588a(19) =14500933504a(20) =2960256206a(21) =17247353848a(22) =55830973422a(23) =1635699693

External references