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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”).

A000411 as a simple table

na(n)
16
2522
3152166
493241002
597949265606
6157201459863882
7357802951084619046
81096291279711115037162
94350684698032741048452486
1021709332137467778453687752842
11133032729004732721625426681085926
12982136301747914281420205946546842922
138597768767880274820173388403096814519366

[6,522,152166,93241002,97949265606,
 157201459863882,357802951084619046,
 1096291279711115037162,4350684698032741048452486,
 21709332137467778453687752842,
 133032729004732721625426681085926,
 982136301747914281420205946546842922,
 8597768767880274820173388403096814519366]