1173553920

Appears in sequences

• a(n) = (2n)!*Sum_{i=1..n} 1/i.at n=5A046673
• a(n) = n! * Sum_{k=1..floor(n/2)} 1/k.at n=11A101609
• n! * Sum[k=1..ceiling(n/2), 1/k].at n=11A101610