A000040The prime numbers.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, …

The first 2 terms appear at position 16.

14159265358979323846264338327950288419716…
position 16
termsstringfirst positionoccurrences
126100,002,410
2231610,000,834
3235698999,505
4235715,070100,056
5235711366,7531,003
6235711138,157,77712
72357111317not within 1,000,000,0000
8235711131719not within 1,000,000,0000

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