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A139810 as a simple table

na(n)
01
12
215
3417
442176
515701273
621418970801
7107224417436160
81968910887183791359
9132633131268024896655873
1032775983842712963307230834176
1129712661745725058784174163778464369

[1,2,15,417,42176,15701273,21418970801,
 107224417436160,1968910887183791359,
 132633131268024896655873,
 32775983842712963307230834176,
 29712661745725058784174163778464369]