login

A001471 as a simple table

na(n)
00
10
20
32
48
520
680
7350
81232
95768
1031040
11142010
12776600
134874012
1427027728
15168369110
161191911840
177678566800
1853474964992
19418199988338
203044269834280
2123364756531620
22199008751634000
231605461415071822

[0,0,0,2,8,20,80,350,1232,5768,31040,142010,
 776600,4874012,27027728,168369110,1191911840,
 7678566800,53474964992,418199988338,3044269834280,
 23364756531620,199008751634000,1605461415071822]