Number of nonnegative integer matrices with 3 distinct columns and any number of distinct nonzero rows with column sums n and columns in decreasing lexicographic order.
A331707
Number of nonnegative integer matrices with 3 distinct columns and any number of distinct nonzero rows with column sums n and columns in decreasing lexicographic order.
Terms
- a(0) =0a(1) =1a(2) =46a(3) =1900a(4) =73028a(5) =2448599a(6) =75497242a(7) =2339274204a(8) =69674762468
External references
- oeis: A331707