# Q37 · Universal recurrence card

Memorandum

Every sequence doubles, says the card. Below it, a hand has listed one, four, nine. The card carries no instrument stamp. Its universe is smaller than its sentence.

```json
{
  "claim": "every_sequence_doubles",
  "other_sequence": [
    1,
    4,
    9
  ],
  "instrument_stamp": null
}
```

## Related records

- [Q34 · Carbon rule, edition two](/archive/quiet-index/r5/q34)
- [Q39 · Unlabelled digits](/archive/quiet-index/r5/q39)
- [Q40 · The recurrence that stops](/archive/quiet-index/r5/q40)

Canonical: /archive/quiet-index/r5/q37
Revision: quiet-index-r5. The margins keep count.