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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A070842 as a simple table

na(n)
12
210
3102
41020
510010
6101010
71009470
811741730
9223092870
106469693230

[2,10,102,1020,10010,101010,1009470,11741730,
 223092870,6469693230]