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A298361 as a simple table

na(n)
31
41
51
62
75
814
950
10233
111249
127595
1349566
14339712
152405167
1617412878
17127855172
18947394711

[1,1,1,2,5,14,50,233,1249,7595,49566,339712,
 2405167,17412878,127855172,947394711]