3680126

Appears in sequences

• a(n) = Sum_{k=0..n} (n!/k!)^3.at n=5A217284
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = (n!)^k * Sum_{j=1..n} (1/j!)^k.at n=41A343863