NTUPLE
Set to 2 different clues across 3 published puzzles, most often “Mathematical sequence of unknown length” — The New York Times, Sunday, 24 October 2010.
6 letters
Every clue on record, most used first
- Mathematical sequence of unknown length2 times
The New York Times — Sunday, 24 October 2010
- Ordered group of numbers in mathonce
The New York Times — Sunday, 10 August 2003