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A268159 as a simple table

na(n)
10
20
30
40
51
60
70
81
90
100
110
123
138
146
150
160
177
1814
1936
200
210
220
2317
2452
25906
26456
27120
280
290
3042
311516
3231818
3323592
346360
350
360
370
38104
397582
40770406
4110213152
423304920
4393600
445040
450
460
47259
4846338
4928194516
50871718016
514067565720
52334738800
531784160
540
550
560
57648

[0,0,0,0,1,0,0,1,0,0,0,3,8,6,0,0,7,14,36,0,0,0,17,
 52,906,456,120,0,0,42,1516,31818,23592,6360,0,0,0,
 104,7582,770406,10213152,3304920,93600,5040,0,0,
 259,46338,28194516,871718016,4067565720,334738800,
 1784160,0,0,0,648]