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A231331 as a simple table

na(n)
01
11
22
33
46
510
620
735
874
9130
10258
11473
121007
131830
143912
157093
1615233
1727831
1860458
19109555
20239039
21433654
22946849
231709524
243746021
256750928

[1,1,2,3,6,10,20,35,74,130,258,473,1007,1830,3912,
 7093,15233,27831,60458,109555,239039,433654,
 946849,1709524,3746021,6750928]