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Search: id:A053683
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| A053683 |
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Number of nonprimes <= prime(n)^2. |
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+0
1
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| 2, 5, 16, 34, 91, 130, 228, 289, 430, 695, 799, 1150, 1418, 1566, 1880, 2400, 2994, 3202, 3880, 4366, 4624, 5430, 6003, 6921, 8246, 8949, 9315, 10068, 10458, 11246, 14252, 15185, 16628, 17131, 19712, 20254, 21920, 23654, 24846, 26688, 28605
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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Up to 25=p(3)^2, the 16 nonprimes are 1,4,6,8,9,10,12,14,15,16,18,20,21,22,24,25.
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CROSSREFS
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A000879.
Sequence in context: A117557 A137997 A139022 this_sequence A082085 A054971 A124720
Adjacent sequences: A053680 A053681 A053682 this_sequence A053684 A053685 A053686
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KEYWORD
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easy,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Feb 16 2000
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