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A271834 as a simple table

na(n)
10
20
30
44
50
642
70
8116
9162
10730
110
122458
130
1411494
1516890
1632628
170
18180960
190
20554994
21931476
222800534
230
2411005898
256643750
2643946838
2744738892
28136580910
290
30720879712
310
322147450740
333250382916
3410923409738
3511517062060
3645683761528
370
38172783692982

[0,0,0,4,0,42,0,116,162,730,0,2458,0,11494,16890,
 32628,0,180960,0,554994,931476,2800534,0,11005898,
 6643750,43946838,44738892,136580910,0,720879712,0,
 2147450740,3250382916,10923409738,11517062060,
 45683761528,0,172783692982]