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A259353 as a simple table

na(n)
11
21
34
414
585
6598
74837
841570
9372830
103436289
1132373742
12310407548
133020894755
1429776585115
15296777846799
162986882651510
1730321553394791

[1,1,4,14,85,598,4837,41570,372830,3436289,
 32373742,310407548,3020894755,29776585115,
 296777846799,2986882651510,30321553394791]