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A199846 as a simple table

na(n)
11
28
341
4206
5944
64188
717879
874424
9303400
101218440
114833416
1218992142
1374057460
14287035502
151107086841
164253339267
1716289667330
1862230152461
19237255014892
20903101912666
213433312226666
2213039708953325
2349488269035164

[1,8,41,206,944,4188,17879,74424,303400,1218440,
 4833416,18992142,74057460,287035502,1107086841,
 4253339267,16289667330,62230152461,237255014892,
 903101912666,3433312226666,13039708953325,
 49488269035164]