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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”).

A081967 as a simple table

na(n)
11
22
38
43
54
618
75
86
97
109261000
119
1210
1311
1412
15329422500
1613
1714
1815
1916
2017

[1,2,8,3,4,18,5,6,7,9261000,9,10,11,12,329422500,
 13,14,15,16,17]