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A029827
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Composite connected numbers: composite n such that g(n)<g(a)+g(b) holds for all relatively prime factorizations n=a.b, where g(x) = ceiling(log_2 x).
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9
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15, 45, 51, 55, 57, 63, 85, 95, 99, 111, 115, 117, 119, 123, 153, 171, 185, 187, 201, 205, 207, 209, 213, 215, 219, 221, 225, 231, 235, 237, 245, 247, 249, 253, 255, 323, 333, 335, 355, 361, 369, 387, 391, 393, 395, 405, 407, 411, 415, 417, 423, 425, 429
(list; graph; refs; listen; history; internal format)
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