oeis gives empty output

*Even if there isn't an exact match*, OEIS is quite helpful (e.g. see [this one](https://oeis.org/search?q=1,3,6,15,39,87,102,267)), but the command `oeis` is not:
```m2
i1 : oeis {1,3,6,15,39,87,102,267}

o1 =
```

Start by reproducing the `oeis {1,3,6,15,39,87,102,267}` command and compare its empty output with the linked OEIS search result. Trace the `oeis` command entry point and identify why this input produces no displayed result. Done means the command provides useful output for this sequence, including when there is no exact match.

Written by the indexing model from the issue text.