A066899a(n) = card({k : phi(k) == n (mod k)}).
1, 3, 1, 4, 2, 5, 1, 7, 2, 3, 2, 7, 2, 5, 2, 7, …
The first 7 terms appear at position 8,920.
1415926535897932384626433…
…34825342117067982148086513282306647093844609550582…
…599413891249721775283479131515574857242454150695950…
…8389522868478312355265821314495768572624334418930396…
…82017928964766975831832713142517029692348896276684403…
…820179289647669758318327131425170296923488962766844032…
…8201792896476697583183271314251702969234889627668440323…
…82017928964766975831832713142517029692348896276684403232…
…612528908391042460515337131425172019923464613997178515200…
| terms | string | first position | occurrences |
|---|---|---|---|
| 1 | 1 | 1 | 99,997,334 |
| 2 | 13 | 110 | 9,998,738 |
| 3 | 131 | 1,096 | 1,001,090 |
| 4 | 1314 | 3,902 | 100,180 |
| 5 | 13142 | 8,920 | 9,994 |
| 6 | 131425 | 8,920 | 999 |
| 7 | 1314251 | 8,920 | 110 |
| 8 | 13142517 | 8,920 | 9 |
| 9 | 131425172 | 35,968,131 | 2 |
| 10 | 1314251723 | not within 1,000,000,000 | 0 |
| 11 | 13142517232 | not within 1,000,000,000 | 0 |
| 12 | 131425172327 | not within 1,000,000,000 | 0 |
Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.