login

A189804 as a simple table

na(n)
01
10
21
31
41
50
60
72
86
914
1020
1120
120
130
140
156
1636
17150
18450
191050
201680
211680
220
230
240
250
2624
27240
281560
297560
3029400
3190720
32218400
33369600
34369600
350
360
370
380
390
40120
411800
4216800
43117600
44667800
453137400
4612243000
4738808000
4896096000
49168168000
50168168000

[1,0,1,1,1,0,0,2,6,14,20,20,0,0,0,6,36,150,450,
 1050,1680,1680,0,0,0,0,24,240,1560,7560,29400,
 90720,218400,369600,369600,0,0,0,0,0,120,1800,
 16800,117600,667800,3137400,12243000,38808000,
 96096000,168168000,168168000]