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A167674 as a simple table

na(n)
01
118
2306
35202
488434
51503378
625557426
7434476242
87386096114
9125563633938
102134581776946
1136287890208082
12616894133537394
1310487200270135698
14178282404592306866
153030800878069216569
1651523614927176679072

[1,18,306,5202,88434,1503378,25557426,434476242,
 7386096114,125563633938,2134581776946,
 36287890208082,616894133537394,10487200270135698,
 178282404592306866,3030800878069216569,
 51523614927176679072]