# Q39 · Unlabelled digits

Table

One, four, nine. A square in the corner is neither an instruction nor a signature. There are many ways to continue three numbers without a rule.

```json
{
  "sequence": [
    1,
    4,
    9
  ],
  "rule": null
}
```

## Related records

- [Q37 · Universal recurrence card](/archive/quiet-index/r5/q37)
- [Q40 · The recurrence that stops](/archive/quiet-index/r5/q40)
- [Q27 · Unresolved shelf mark](/archive/quiet-index/r5/q27)

Canonical: /archive/quiet-index/r5/q39
Revision: quiet-index-r5. The margins keep count.