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15, 21, 39, 51, 55, 75, 91, 99, 105, 121, 159, 165, 169, 187, 195, 249, 265, 285, 309, 325, 327, 339, 351, 385, 441, 471, 481, 489, 511, 517, 531, 595, 609, 615, 625, 685, 789, 805, 841, 879, 891, 909, 915, 939, 951, 955, 987, 999, 1027, 1035, 1045, 1057
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refs;
listen;
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internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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The 12th composite is 21. In the prime-composite array (A063173), all of the elements in the diagonal containing T(12,1) are 0. So 21 is in the sequence.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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