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A256982 as a simple table

na(n)
11
21
32
46
515
651
7190
8767
93256
1014420
1165298
12301920
131416398
146730574
1532315128

[1,1,2,6,15,51,190,767,3256,14420,65298,301920,
 1416398,6730574,32315128]