login

A068311 as a simple table

na(n)
00
10
21
35
444
5244
62064
715168
8181824
91878336
1021323520
11238187520
123496919040
1345938949120
14699188474880
1511185253452800
16220809635020800
173774686585241600
1875413794524364800
191439264469668659200
2031704771803185152000
21690129227948654592000

[0,0,1,5,44,244,2064,15168,181824,1878336,
 21323520,238187520,3496919040,45938949120,
 699188474880,11185253452800,220809635020800,
 3774686585241600,75413794524364800,
 1439264469668659200,31704771803185152000,
 690129227948654592000]