id:A074315 - OEIS Search Results

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Abundant triangular numbers.

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36, 66, 78, 120, 210, 276, 300, 378, 528, 630, 666, 780, 820, 990, 1128, 1176, 1326, 1540, 1596, 1770, 1830, 2016, 2080, 2346, 2556, 2628, 2850, 3160, 3240, 3486, 3570, 3828, 4095, 4278, 4560, 4656, 4950, 5460, 5778, 5886, 6216, 6328, 6786, 7140, 7260 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=66 because sum of aliquot divisors of 66 (which is a triangular number) is 1+2+3+6+11+22+33=78 which is more than 66, hence it is abundant. 66 is 2nd abundant triangular number.`
	CROSSREFS	`Sequence in context: A044022 A082295 A060671 this_sequence A126789 A068144 A036785` `Adjacent sequences: A074312 A074313 A074314 this_sequence A074316 A074317 A074318`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Sep 22 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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