Definition:Rare Number/Sequence

Sequence

The sequence of rare numbers begins:

$65, 621 \, 770, 281 \, 089 \, 082, 2 \, 022 \, 652 \, 202, 2 \, 042 \, 832 \, 002, 868 \, 591 \, 084 \, 757$

This sequence is A035519 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $621,770$