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Template:Sequence of the Day for September 29
From OeisWiki
Intended for: September 29, 2011
Timetable
- First draft entered by Alonso del Arte on August 17, 2011 ✓
- Draft reviewed by Daniel Forgues on September 28, 2012 ✓
- Draft to be approved by August 29, 2011
| Yesterday's SOTD * Tomorrow's SOTD |
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A070027: Prime numbers whose initial, all intermediate and final iterated sums of [decimal] digits are primes.
- { ... 11, 23, 29, 41, 43, 47, 61, 83, 101, 113, ... }
The more interesting members of this sequence are those for which there is more than one step to get to the digital root. For example, with 29, we have 2 + 9 = 11 and then 1 + 1 = 2, whereas with 41 it just goes 4 + 1 = 5.
