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A019171 as a simple table

na(n)
30
40
54
64
78
820
948
10106
11264
12580
131462
143724
158604
1621558
1755364
18137162
19348320
20900372
212325534
226063822
2315903112
2441844862
25110699956
26293478616
27779292432
282075209638
295534781586
3014778464050
3139525926012

[0,0,4,4,8,20,48,106,264,580,1462,3724,8604,21558,
 55364,137162,348320,900372,2325534,6063822,
 15903112,41844862,110699956,293478616,779292432,
 2075209638,5534781586,14778464050,39525926012]