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A238115 as a simple table

na(n)
11
26
332
4182
51117
67280
749625
8349998
92535077
1018758264
11141254654
121079364104
138350678169
1465298467486
15515349097712
164100346740510
1732858696386765
18265001681344568
192149447880547398
2017524254766905368
21143540915998174577
221180736721910617182

[1,6,32,182,1117,7280,49625,349998,2535077,
 18758264,141254654,1079364104,8350678169,
 65298467486,515349097712,4100346740510,
 32858696386765,265001681344568,2149447880547398,
 17524254766905368,143540915998174577,
 1180736721910617182]