Template:Sequence of the Day for March 12

Intended for: March 12, 2013

Timetable

• First draft entered by Alonso del Arte on February 17, 2012 ✓
• Draft reviewed by Daniel Forgues on March 11, 2016 ✓
• Draft to be approved by February 12, 2013

Yesterday's SOTD * Tomorrow's SOTD

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A066680: Badly sieved numbers: as in the sieve of Eratosthenes, multiples of unmarked numbers

p

are marked, but only up to

p 2

.

{ 2, 3, 5, 7, 8, 11, 12, 13, 17, 18, 19, 23, 27, 29, ... }

So 6 gets culled out not for being an even number but for being a multiple of 3 less than 9; and 12 gets to stay because it is greater than both 4 and 9, and not a multiple of 5, 7 or 11.