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A271517 as a simple table

na(n)
10
20
30
40
50
60
70
80
912
100
110
120
1312
141440
150
160
170
1812
192961
20207360
210
220
230
2412
253192
26948561
2746448640
280
290
300
3112
323195
331460310
34526617762
3517836277760
360
370
380
3912
403195
411563960
421400351232
43562292792592
4412328435187712
450
460
470
4812
493195

[0,0,0,0,0,0,0,0,12,0,0,0,12,1440,0,0,0,12,2961,
 207360,0,0,0,12,3192,948561,46448640,0,0,0,12,
 3195,1460310,526617762,17836277760,0,0,0,12,3195,
 1563960,1400351232,562292792592,12328435187712,0,
 0,0,12,3195]