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Search: id:A142728
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| A142728 |
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Nonprimes of the form (p(n)-2*n)/3, where p(n)=n-th prime. |
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+0
1
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| 0, 1, 1, 29, 49, 75, 77, 81, 95, 105, 115, 119, 143, 147, 159, 187, 187, 207, 217, 219, 235, 235, 243, 249, 267, 273, 289, 321, 325, 335, 338, 365, 369, 369, 381, 381, 395, 395, 411, 411, 417, 427, 441, 459, 465, 471, 471, 485, 485, 501, 525, 527, 537, 549
(list; graph; listen)
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OFFSET
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1,4
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EXAMPLE
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If n=1, then (p(1)-2*1)/3=!2-2)/3=0=a(1).
If n=7, then (p(7)-2*7)/3=(17-14)/3=1=a(2).
If n=8, then (p(8)-2*8)/3=(19-16)/3=1=a(3).
If n=38, then (p(38)-2*38)/3=(163-76)/3=29=a(4).
If n=55, then (p(55)-2*55)/3=(257-110)/3=49=a(5).
If n=74, then (p(74)-2*74)/3=(373-148)/3=75=a(6).
If n=76, then (p(76)-2*14)/3=(383-152)/3=77=a(7), etc.
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CROSSREFS
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Cf. A000040, A141468.
Sequence in context: A106754 A063642 A108258 this_sequence A042947 A134555 A164075
Adjacent sequences: A142725 A142726 A142727 this_sequence A142729 A142730 A142731
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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), Oct 07 2008
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