|
| |
|
|
A123989
|
|
a(n) = H(2n)*(2n)!/n! where H(n) = sum{k=1 to n} 1/k, the n-th harmonic number.
|
|
2
| |
|
|
0, 3, 25, 294, 4566, 88572, 2064504, 56243184, 1754322480, 61664980320, 2412077832000, 103928089910400, 4890979939104000, 249630539076979200, 13734482066534476800, 810355993296898406400, 51040766703826377676800
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
