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A306635 as a simple table

na(n)
11
22
3576
414332723200
572474629486854275072000000
6482580045081719158086051946616717605601280000000000000

[1,2,576,14332723200,72474629486854275072000000,
 48258004508171915808605194661671760560128000000000\
 0000]