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A073687
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Group the composite numbers so that the sum of each group is a prime: (4, 6, 8, 9, 10), (12, 14, 15), (16, 18, 20, 21, 22), (24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55), ...; sequence gives first term in each group.
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2
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4, 12, 16, 24, 56, 58, 65, 68, 70, 77, 87, 94, 99, 102, 106, 114, 116, 118, 140, 142, 185, 195, 219, 221, 224, 226, 235, 255, 259, 266, 278, 280, 290, 302, 310, 318, 334, 366, 370, 375, 377, 399, 403, 411, 413, 415, 442, 447, 462, 494, 530, 532, 550, 568, 575
(list; graph; refs; listen; history; internal format)
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