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Search: id:A110230
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| A110230 |
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5-almost primes p * q * r * s * t not relatively prime to p + q + r + s + t. |
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+0
12
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| 32, 72, 120, 162, 168, 180, 200, 243, 264, 270, 280, 312, 378, 392, 396, 408, 440, 450, 456, 520, 552, 588, 594, 612, 616, 630, 680, 696, 700, 702, 728, 744, 750, 760, 780, 828, 882, 888, 918, 920, 945, 952, 968, 984, 990, 1026, 1032, 1044, 1050, 1064, 1092
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OFFSET
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1,1
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COMMENT
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p, q, r, s, t are not necessarily distinct. The converse to this is A110229: 5-almost primes p * q * r * s * t which are relatively prime to p+q+r+s+t. A014614 is the 5-almost primes.
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EXAMPLE
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180 is in this sequence because 180 = 2^2 * 3^2 * 5, the sum of the prime factors being 2 + 2 + 3 + 3 + 5 = 15 = 3 * 5 which has two prime factors in common with 180.
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CROSSREFS
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Cf. A014614, A110187, A110188, A110227, A110228, A110229, A110231, A110232, A110289, A110290, A110296, A110297.
Sequence in context: A101539 A106700 A104026 this_sequence A007797 A135269 A086047
Adjacent sequences: A110227 A110228 A110229 this_sequence A110231 A110232 A110233
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KEYWORD
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easy,nonn
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AUTHOR
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Jonathan Vos Post (jvospost2(AT)yahoo.com), Jul 17 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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