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A273468 as a simple table

na(n)
11
21
31
41
53
611
761
8499
95500
1075635
111237670
1223352425
13498028767
1411836515526
15310152665647

[1,1,1,1,3,11,61,499,5500,75635,1237670,23352425,
 498028767,11836515526,310152665647]