213798

Appears in sequences

• Number of n X n symmetric matrices with nonnegative entries and all row sums 2.at n=8A000985
• Number of (8*n) X 8 binary arrays with rows in nonincreasing order, n ones in every column and no more than 2 ones in any row.at n=2A188402
• T(n,k) = Number of (n*k) X k binary arrays with rows in nonincreasing order, n ones in every column and no more than 2 ones in any row.at n=37A188403