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A184718 as a simple table

na(n)
11
21
32
42
515
676
7560
83604
924327
10152952
11925232
125495907
1331966719
14182331659
151021217701
165622236708
1730456148470
18162478306805
19854327762047
204430787907798
2122680031606293
22114649453836280
23572666511225162

[1,1,2,2,15,76,560,3604,24327,152952,925232,
 5495907,31966719,182331659,1021217701,5622236708,
 30456148470,162478306805,854327762047,
 4430787907798,22680031606293,114649453836280,
 572666511225162]