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A006172 as a simple table

na(n)
04
12
29
310
442
579
6252
7582
81645
94106
1011070
1128459
1275348
13195898
14515073
151344906
163526786
179223895
1824163596
1963236638
20165595269
21433469962
221134942774
232971150995
247778845732
2520364843314
2653316562617
27139583423242
28365436006810
29956720876191
302504732642460

[4,2,9,10,42,79,252,582,1645,4106,11070,28459,
 75348,195898,515073,1344906,3526786,9223895,
 24163596,63236638,165595269,433469962,1134942774,
 2971150995,7778845732,20364843314,53316562617,
 139583423242,365436006810,956720876191,
 2504732642460]