id:A045746 - OEIS Search Results

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Sum of divisors is a triangular number.

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1, 2, 5, 8, 12, 22, 36, 45, 54, 56, 87, 95, 98, 104, 116, 152, 160, 200, 212, 258, 328, 342, 356, 393, 427, 441, 473, 492, 531, 572, 582, 588, 660, 668, 672, 726, 740, 800, 843, 852, 858, 879, 908, 909, 910, 940, 962, 992 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`sigma(8)=15 is a triangular number.`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A011974 A049633 A066614 this_sequence A053614 A004711 A000789` `Adjacent sequences: A045743 A045744 A045745 this_sequence A045747 A045748 A045749`
	KEYWORD	`nonn`
	AUTHOR	`Felice Russo (felice.russo(AT)katamail.com)`

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Last modified September 7 12:28 EDT 2008. Contains 143483 sequences.

AT&T Labs Research