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A261858 as a simple table

na(n)
7757
813671
9148638
105623044
1119334910
12115231480
13522931570
142868333476
1563481817735
16156363633615
17661651830728
182317522429544
198940138012274
2034465610055870
21703252581037436
221456494080466446
235428978793488341
2416082092961535517
2553836540488601696

[757,13671,148638,5623044,19334910,115231480,
 522931570,2868333476,63481817735,156363633615,
 661651830728,2317522429544,8940138012274,
 34465610055870,703252581037436,1456494080466446,
 5428978793488341,16082092961535517,
 53836540488601696]