1285
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Number
$1285$ (one thousand, two hundred and eighty-five) is:
- $5 \times 257$
- The number of distinct free $9$-ominoes
Also see
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $35$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $35$