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A037163 as a simple table

na(n)
01
12
22
34
46
512
620
739
871
9137
10261
11511
12995
131974
143915
157841
1615749
1731835

[1,2,2,4,6,12,20,39,71,137,261,511,995,1974,3915,
 7841,15749,31835]