id:A074255 - OEIS Search Results

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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 square-free numbers from the smallest prime factor of n to the largest prime factor of n.

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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; listen)

	OFFSET	`1,2`
	EXAMPLE	`1147 = 31*37; sum of composites between 31 and 37 is: 32+33+34+35+36 = 170 and sum of square-free numbers between 31 and 37 is: 31+33+34+35+37 = 170.`
	CROSSREFS	`Sequence in context: A013539 A123697 A031785 this_sequence A054999 A086259 A098976` `Adjacent sequences: A074252 A074253 A074254 this_sequence A074256 A074257 A074258`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Sep 20 2002`
	EXTENSIONS	`a(7)-a(31) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Oct 12 2008`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research