223456

Appears in sequences

• Expansion of e.g.f.: exp(2x)/(1-x)^2.at n=7A081923
• Square array, read by antidiagonals, where the n-th row is the n-th binomial transform of the factorials, starting with row 0: {1!,2!,3!,...}.at n=47A089900
• Number of n X n 0..2 arrays with row and column sums one greater than the previous row and column.at n=4A202858
• T(n,k) = Number of n X n 0..k arrays with row and column sums one greater than the previous row and column.at n=19A202864
• Number of 5 X 5 0..n arrays with row and column sums one greater than the previous row and column.at n=1A202867