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Search: id:A110187
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| A110187 |
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3-almost primes p * q * r relatively prime to p+q+r. |
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+0
12
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| 12, 20, 28, 44, 45, 52, 63, 68, 75, 76, 92, 99, 116, 117, 124, 147, 148, 153, 164, 165, 171, 172, 175, 188, 207, 212, 236, 244, 245, 261, 268, 273, 275, 279, 284, 292, 316, 325, 332, 333, 345, 356, 363, 369, 385, 387, 388, 399, 404, 412, 423, 425, 428, 435
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A110188 is the converse, 3-almost primes p * q * r not relatively prime to p+q+r.
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EXAMPLE
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a(1) = 12 because 12 = 2^2 * 3, which is relatively prime to 2 + 2 + 3 = 7.
30 is not in the sequence, since 30 = 2 * 3 * 5, which is in fact divisible by 2 + 3 + 5 = 10.
92 is in the sequence since 92 = 2^2 x 23, 2 + 2 + 23 = 27 = 3^3, (92, 27) = 1.
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CROSSREFS
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Cf. A014612, A110188, A110227, A110228, A110229, A110230, A110231, A110232, A110289, A110290, A110296, A110297.
Sequence in context: A108027 A090767 A117227 this_sequence A096156 A107277 A124672
Adjacent sequences: A110184 A110185 A110186 this_sequence A110188 A110189 A110190
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KEYWORD
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easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), Jul 15 2005
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EXTENSIONS
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Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 20 2005
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