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Template:Sequence of the Day for April 24
From OeisWiki
Intended for: April 24, 2013
Timetable
- First draft entered by Alonso del Arte on March 19, 2012 ✓
- Draft reviewed by Daniel Forgues on April 26, 2012 ✓
- Draft approved by Alonso del Arte on January 12, 2013 ✓
Yesterday's SOTD * Tomorrow's SOTD |
The line below marks the end of the <noinclude> ... </noinclude> section.
8 n 2 + 6 n − 1 |
221 | 223 | 225 | 227 | 229 | 231 | 233 | 235 |
219 | 145 | 147 | 149 | 151 | 153 | 155 | 157 |
217 | 143 | 85 | 87 | 89 | 91 | 93 | 95 |
215 | 141 | 83 | 41 | 43 | 45 | 47 | 49 |
213 | 139 | 81 | 39 | 13 | 15 | 17 | 19 |
211 | 137 | 79 | 37 | 11 | 1 | 3 | 21 |
209 | 135 | 77 | 35 | 9 | 7 | 5 | 23 |
In a variant of the Ulam spiral in which only odd numbers are entered, some primes still line up along some diagonals but not others. Without the even numbers, primes can also line up in horizontal and diagonal lines. This sequence comes from an upwards vertical line which starts with 13.