A252371a(n) = A243055(A251727(n)).

2, 3, 2, 4, 5, 3, 2, 3, 6, 7, 4, 2, 3, 4, 8, 2, …

The first 5 terms appear at position 16,490.

…87581647032458129087839523245323789602984166922548964…
position 16,490
termsstringfirst positionoccurrences
126100,002,410
2231610,000,834
32321,7831,000,592
4232413,32999,622
52324516,49010,110
623245316,4901,052
7232453216,49096
82324532316,4905
9232453236not within 1,000,000,0000
102324532367not within 1,000,000,0000
1123245323674not within 1,000,000,0000
12232453236742not within 1,000,000,0000

Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.