id:A074253 - OEIS Search Results

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Numbers n such that the sum of square-free numbers from the smallest prime factor of n to the largest prime factor of n is a square.

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1, 111, 159, 299, 323, 333, 477, 555, 777, 793, 795, 913, 922, 999, 1113, 1221, 1431, 1443, 1665, 1749, 1844, 1887, 2067, 2109, 2331, 2385, 2553, 2703, 2766, 2775, 2867, 2993, 2997, 3021, 3219, 3339, 3441, 3657, 3663, 3688, 3885, 3887, 3975, 4107, 4293 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`111=3*37 and sum of square-free numbers between 3 and 37 is: 3+5+6+7+10+11+13+14+15+17+19+21+22+23+26+29+30+31+33+34+35+37 = 441, a square.`
	CROSSREFS	`Sequence in context: A095613 A108721 A084325 this_sequence A082945 A088287 A082946` `Adjacent sequences: A074250 A074251 A074252 this_sequence A074254 A074255 A074256`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Sep 20 2002`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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