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Search: id:A138117
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| A138117 |
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Triangle read by rows: row n lists the first 2n-1 prime numbers. |
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+0
1
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| 2, 2, 3, 5, 2, 3, 5, 7, 11, 2, 3, 5, 7, 11, 13, 17, 2, 3, 5, 7, 11, 13, 17, 19, 23, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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Triangle begins:
....... 2
..... 2,3,5
... 2,3,5,7,11
. 2,3,5,7,11,13,17
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CROSSREFS
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Cf. A000040, A037126, A138139, A138143.
Sequence in context: A058256 A140183 A130725 this_sequence A117918 A039638 A090926
Adjacent sequences: A138114 A138115 A138116 this_sequence A138118 A138119 A138120
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Mar 14 2008, corrected Mar 15 2008
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