Number of nonnegative integer matrices with pairwise distinct nonzero rows, the total sum of elements equal n, the same sum of elements in each column, and the columns coming in nonincreasing lexicographic order.
A331713
Number of nonnegative integer matrices with pairwise distinct nonzero rows, the total sum of elements equal n, the same sum of elements in each column, and the columns coming in nonincreasing lexicographic order.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =18a(4) =21a(5) =147a(6) =77a(7) =1119a(8) =2270a(9) =12273a(10) =1089a(11) =464200a(12) =4229a(13) =4148223a(14) =32941976a(15) =159812905a(16) =66153a(17) =10211281004a(18) =263321a(19) =205923976532a(22) =4199061
External references
- oeis: A331713