A031057Write 2n-1 in base 8 and juxtapose.
1, 3, 5, 7, 1, 1, 1, 3, 1, 5, 1, 7, 2, 1, 2, 3, …
The first 4 terms appear at position 4,425.
1415926535897932384626433…
…34825342117067982148086513282306647093844609550582…
…285844479526586782105114135473573952311342716610213…
…0990796547376125517656751357517829666454779174501129…
…17464263574552540790914513571113694109119393251910760…
…174642635745525407909145135711136941091193932519107602…
…1746426357455254079091451357111369410911939325191076020…
…17464263574552540790914513571113694109119393251910760208…
…787802450272284404854954135711131309500384415684854873725…
| terms | string | first position | occurrences |
|---|---|---|---|
| 1 | 1 | 1 | 99,997,334 |
| 2 | 13 | 110 | 9,998,738 |
| 3 | 135 | 2,727 | 998,705 |
| 4 | 1357 | 4,425 | 99,956 |
| 5 | 13571 | 6,112 | 9,934 |
| 6 | 135711 | 6,112 | 990 |
| 7 | 1357111 | 6,112 | 91 |
| 8 | 13571113 | 6,112 | 7 |
| 9 | 135711131 | 973,077,828 | 1 |
| 10 | 1357111315 | not within 1,000,000,000 | 0 |
| 11 | 13571113151 | not within 1,000,000,000 | 0 |
| 12 | 135711131517 | not within 1,000,000,000 | 0 |
Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.