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A000531 as a simple table

na(n)
11
27
338
4187
5874
63958
717548
876627
9330818
101415650
116015316
1225413342
13106853668
14447472972
151867450648
167770342787
1732248174258
18133530264682
19551793690628
202276098026922
219373521044908
2238546133661492

[1,7,38,187,874,3958,17548,76627,330818,1415650,
 6015316,25413342,106853668,447472972,1867450648,
 7770342787,32248174258,133530264682,551793690628,
 2276098026922,9373521044908,38546133661492]