id:A049227 - OEIS Search Results

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Sigma(n) / d(n) is a perfect square associated with A049226.

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36, 144, 196, 400, 900, 1764, 3136, 2304, 3844, 4900, 12100, 7056, 13689, 9216, 6400, 15876, 25600, 44100, 93636, 57600, 32400, 69696, 81796, 94864, 57600, 213444, 72900, 152100, 152100, 360000, 230400, 260100, 298116 (list; graph; listen)

	OFFSET	`2,1`
	EXAMPLE	`a(27)=72900. Sum of 16 divisors, sigma(n)=1166400. 1166400/16=72900. 1166400-957551=208849. 72900 and 208849 are perfect squares`
	CROSSREFS	`Cf. A049228.` `Sequence in context: A044368 A044749 A067865 this_sequence A119767 A016910 A005017` `Adjacent sequences: A049224 A049225 A049226 this_sequence A049228 A049229 A049230`
	KEYWORD	`easy,nonn`
	AUTHOR	`Enoch Haga (Enokh(AT)comcast.net)`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

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