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A074255
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Numbers n such that the sum of composites from the smallest prime factor of n to the largest prime factor of n is equal to the sum of squarefree numbers from the smallest prime factor of n to the largest prime factor of n.
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0
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1, 1147, 3953, 5609, 7387, 35557, 42439, 55189, 64507, 70747, 198907, 233227, 239117, 241133, 264851, 348091, 372091, 398239, 409457, 431633, 443111, 568507, 613121, 657443, 988027, 1071209, 1102267, 1136347, 1315609, 1416091, 1570243
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| 1147 = 31*37; sum of composites between 31 and 37 is: 32+33+34+35+36 = 170 and sum of squarefree numbers between 31 and 37 is: 31+33+34+35+37 = 170.
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CROSSREFS
| Sequence in context: A196779 A180344 A031785 * A054999 A086259 A175606
Adjacent sequences: A074252 A074253 A074254 * A074256 A074257 A074258
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KEYWORD
| nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Sep 20 2002
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EXTENSIONS
| a(7)-a(31) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Oct 12 2008
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