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A173253 as a simple table

na(n)
01
12
23
35
410
526
687
7359
81744
99680
1060201
11413993
123116758
1325485014
14224845995
152128603307
1621520115452
17231385458428
182636265133869
1931725150246701
20402096338484226
215353594391608322
2274702468784746223
231090126355291598575
2416604660518848685480

[1,2,3,5,10,26,87,359,1744,9680,60201,413993,
 3116758,25485014,224845995,2128603307,21520115452,
 231385458428,2636265133869,31725150246701,
 402096338484226,5353594391608322,
 74702468784746223,1090126355291598575,
 16604660518848685480]