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Search: id:A161205
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| A161205 |
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Triangle read by rows in which row n lists: 2n-1 followed by 2n numbers 2n. |
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+0
16
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| 1, 2, 2, 3, 4, 4, 4, 4, 5, 6, 6, 6, 6, 6, 6, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 16, 16, 16, 16
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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O. E. Pol, Determinacion geometrica de los numeros primos y perfectos
O. E. Pol, Illustration: Divisors and pi(x)
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EXAMPLE
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Triangle begins:
1, 2, 2;
3, 4, 4, 4, 4;
5, 6, 6, 6, 6, 6, 6;
7, 8, 8, 8, 8, 8, 8, 8, 8;
9,10,10,10,10,10,10,10,10,10,10;
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CROSSREFS
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Cf. A000005, A000720, A018253, A160811, A160812, A160813, A161203, A161204, A161339.
Sequence in context: A003002 A087180 A029121 this_sequence A164531 A138161 A034136
Adjacent sequences: A161202 A161203 A161204 this_sequence A161206 A161207 A161208
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KEYWORD
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easy,more,nonn,tabf
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Jun 19 2009
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