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A078846 as a simple table

na(n)
01
15
240
3328
42556
518452
6126096
7827901
85276913
932887213
10201443165
111217389949
127279826998
1343168558912
14254258462459
151489291941733
168683388113017
1750433408838966

[1,5,40,328,2556,18452,126096,827901,5276913,
 32887213,201443165,1217389949,7279826998,
 43168558912,254258462459,1489291941733,
 8683388113017,50433408838966]