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Search: id:A161671
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| A161671 |
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a(n) = nth prime minus nth nonprime. |
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+0
4
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| 2, 2, 1, 1, 3, 4, 7, 7, 9, 14, 15, 19, 21, 22, 25, 29, 34, 35, 40, 43, 43, 47, 50, 55, 62, 65, 65, 68, 69, 71, 83, 86, 91, 91, 100, 101, 106, 111, 113, 118, 123, 124, 133, 133, 135, 136, 147, 158, 161, 161, 164, 169, 169, 177, 182, 187, 192, 193, 197, 200, 201, 209
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A000040(n)-A141468(n)
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EXAMPLE
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2(=2-0), 2(=3-1), 1(=5-4), 1(=7-6), 3(=11-8), 4(=13-9), 7(=17-10), 7(=19-12), 9(=23-14), 14(=29-15), etc.
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CROSSREFS
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nth nonprime = A141468(n).
Cf. A000040, A141468.
Sequence in context: A115594 A086623 A034928 this_sequence A144444 A054106 A132044
Adjacent sequences: A161668 A161669 A161670 this_sequence A161672 A161673 A161674
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KEYWORD
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nonn
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 16 2009
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EXTENSIONS
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Edited by N. J. A. Sloane, Jun 30 2009
Replaced 207 by 209 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 04 2009
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