login

A187555 as a simple table

na(n)
01
10
21
30
42
51
60
76
89
91
100
1124
1266
1324
141
150
16120
17500
18350
1950
201
210
22720
234110
244500
251275
2690
271
280
295040
3037044
3156840
3225725
333675
34147
351
360
3740320
38365904
39735392
40473830
41109760
429016
43224
441
450
46362880
473945024
489922416
498477784
502828574
51381024
5219656
53324
541
550
563628800
5746195920
58140724000
59151972800
6067869900
6113287330
621134000
6339150
64450
651

[1,0,1,0,2,1,0,6,9,1,0,24,66,24,1,0,120,500,350,
 50,1,0,720,4110,4500,1275,90,1,0,5040,37044,56840,
 25725,3675,147,1,0,40320,365904,735392,473830,
 109760,9016,224,1,0,362880,3945024,9922416,
 8477784,2828574,381024,19656,324,1,0,3628800,
 46195920,140724000,151972800,67869900,13287330,
 1134000,39150,450,1]