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A157484
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Numbers n such that n-+1 are divisible by exactly 4 primes, counted with multiplicity.
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4
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55, 89, 151, 197, 233, 249, 295, 307, 329, 341, 343, 349, 461, 489, 491, 569, 571, 665, 713, 739, 775, 851, 857, 859, 869, 871, 949, 1013, 1015, 1061, 1097, 1111, 1149
(list; graph; refs; listen; history; internal format)
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