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Search: id:A077554
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| 4, 6, 9, 10, 15, 25, 21, 25, 35, 49, 35, 49, 55, 77, 121, 65, 77, 91, 121, 143, 169, 119, 121, 143, 169, 187, 221, 289, 169, 187, 209, 221, 247, 289, 323, 361, 247, 253, 289, 299, 323, 361, 391, 437, 529, 323, 361, 377, 391, 437, 493, 529, 551, 667, 841, 437
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OFFSET
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0,1
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COMMENT
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If there are two sets of distinct composite numbers satisfying the above condition then the set with lesser product is chosen irrespective of the number of prime divisors. Perhaps the ambiguity may not arise. E.g. Row 6 is 4,6,9,10,15,25. This row can not be extended to get the next row without bringing in another prime because every number divisible by 2,3 or 5 will be a multiple of one of the previous terms. Hence in row 7, prime 7 has to be brought in and then we get a new set of numbers 4,6,9,10,14,15,21.
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CROSSREFS
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Cf. A002024.
Cf. A001358, A077553, A077555, A087112, A005843.
Sequence in context: A133234 A111206 A087112 this_sequence A118778 A108635 A071964
Adjacent sequences: A077551 A077552 A077553 this_sequence A077555 A077556 A077557
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 10 2002
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 24 2003
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