251610

Appears in sequences

• Number of inequivalent n X n binary matrices, where equivalence means permutations of rows or columns.at n=6A002724
• Number of compositions of n into positive triangular numbers.at n=30A023361
• Number of 6 X 6 matrices with entries mod n, up to row and column permutation.at n=1A058004
• Number A(n,k) of inequivalent n X n matrices with entries from [k], where equivalence means permutations of rows or columns; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=42A246106
• Number of compositions (ordered partitions) of n into two or more triangular numbers.at n=30A348529