a(n) = floor(n!*h(n)/n), where h(n) = Sum_{k=1..n} 1/k.
A180589
a(n) = floor(n!*h(n)/n), where h(n) = Sum_{k=1..n} 1/k.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =54a(5) =294a(6) =1866a(7) =13698a(8) =114064a(9) =1062864a(10) =10958530a(11) =123870240a(12) =1523289156a(13) =20247546240a(14) =289277533440
External references
- oeis: A180589