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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”).

A156464 as a simple table

na(n)
11
22
32
47
519
61430
79131
81559914
917481322
104701559354
1199812199364
1242194032310078

[1,2,2,7,19,1430,9131,1559914,17481322,4701559354,
 99812199364,42194032310078]