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A042139 as a simple table

na(n)
01
12
23
38
443
51040
65243
711526
816769
945064
102179841
114404746
126584587
1317573920
1494454187
152284474408
1611516826227
1725318126862
1836834953089
1998988033040
204788260539009
219675509111058
2214463769650067
2338603048411192
24207479011706027
255018099329355840

[1,2,3,8,43,1040,5243,11526,16769,45064,2179841,
 4404746,6584587,17573920,94454187,2284474408,
 11516826227,25318126862,36834953089,98988033040,
 4788260539009,9675509111058,14463769650067,
 38603048411192,207479011706027,5018099329355840]