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A006067 as a simple table

na(n)
11
21
31
45
57
637
7104
8766
93970
1043318
11431932
127695805
13137066448
144015896016
15128095791922
166371333036059
17355704307903818
1830153126159555641
192952926822418475378
20431453249608567040694
2173569487283165427567144
2218558756256964594960321428

[1,1,1,5,7,37,104,766,3970,43318,431932,7695805,
 137066448,4015896016,128095791922,6371333036059,
 355704307903818,30153126159555641,
 2952926822418475378,431453249608567040694,
 73569487283165427567144,
 18558756256964594960321428]