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A098644 as a simple table

na(n)
10
20
30
41
53
67
730
8129
9710
105233
1151819
12709352
1313710800
14379963761
1515289965453
16902291244954
1778717614351420
1810220774050567926
191986419713778008167
20580763090016320217550
21256553735019174430718651

[0,0,0,1,3,7,30,129,710,5233,51819,709352,
 13710800,379963761,15289965453,902291244954,
 78717614351420,10220774050567926,
 1986419713778008167,580763090016320217550,
 256553735019174430718651]