| DATA
|
1, 3, 70, 4620, 599256, 128648520, 41281606080, 18507916627200, 11049593741746560, 8474451191616009600, 8119493428719228192000, 9504049395027168805824000, 13345312208487981260926464000, 22140681034117932250214874624000, 42846437958647788197412779939840000, 95657301566159892238019686222356480000, 244038306493164073323605513327887380480000
|
| PROG
|
(PARI) {a(n) = (2*n-1)! * polcoeff( serreverse(x - sum(m=2, n, (-1)^m * x^(2*m-1) / (m*(m-1)) ) +O(x^(2*n+2))), 2*n-1)}
for(n=1, 25, print1(a(n), ", "))
|