login

A156766 as a simple table

na(n)
01
11
21
31
48
51
61
778
878
91
101
11960
129360
13960
141
151
1614520
171742400
181742400
1914520
201
211
22262080
23475675200
245854464000
25475675200
26262080
271
281
295508720
30180465667200
3133594378048000
3233594378048000
33180465667200
345508720
351
361
37132249600
3891065752064000
39305980926935040000
404627961519892480000
41305980926935040000
4291065752064000
43132249600
441

[1,1,1,1,8,1,1,78,78,1,1,960,9360,960,1,1,14520,
 1742400,1742400,14520,1,1,262080,475675200,
 5854464000,475675200,262080,1,1,5508720,
 180465667200,33594378048000,33594378048000,
 180465667200,5508720,1,1,132249600,91065752064000,
 305980926935040000,4627961519892480000,
 305980926935040000,91065752064000,132249600,1]