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Search: id:A077667
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| A077667 |
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Triangle read by rows. Let k = n-th composite number. Then n-th row gives k smallest numbers unrelated to k (numbers which do not divide k, are not divisible by k and are not coprime to k). |
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4
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| 6, 10, 14, 18, 4, 8, 9, 10, 14, 15, 6, 10, 12, 14, 18, 20, 22, 26, 6, 12, 15, 21, 24, 30, 33, 39, 42, 4, 6, 8, 12, 14, 15, 16, 18, 22, 24, 8, 9, 10, 14, 15, 16, 18, 20, 21, 22, 26, 27, 4, 6, 8, 10, 12, 16, 18, 20, 21, 22, 24, 26, 30, 32, 6, 9, 10, 12, 18, 20, 21, 24, 25, 27, 33
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Primes do not have unrelated numbers.
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EXAMPLE
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6,10,14,18; 4,8,9,10,14,15; 6,10,12,14,18,20,22,26; 6,12,15,21,24,30,33,...
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CROSSREFS
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Cf. A077668, A077669.
Sequence in context: A085647 A072901 A075777 this_sequence A091577 A115036 A133653
Adjacent sequences: A077664 A077665 A077666 this_sequence A077668 A077669 A077670
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KEYWORD
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nonn,tabf
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 15 2002
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EXTENSIONS
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Corrected and extended by Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 27 2003
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