15755497776
domain: N
Appears in sequences
- Number of nX3 arrays containing 3 indistinguishable copies of 1..n with rows and columns in lexicographically strictly increasing order.at n=6A180837
- T(n,k) = number of n X k arrays containing k indistinguishable copies of 1..n with rows and columns in lexicographically strictly increasing order.at n=42A180839