id:A117310 - OEIS Search Results

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Triangular numbers for which the product of the digits is a hexagonal number.

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0, 1, 6, 10, 105, 120, 153, 190, 210, 231, 351, 406, 465, 630, 703, 741, 780, 820, 903, 990, 1035, 1081, 1540, 1770, 1830, 2016, 2080, 2701, 2850, 3003, 3081, 3160, 3240, 3403, 3570, 4005, 4095, 4560, 4950, 5050, 5460, 6105, 6670, 6786, 6903, 7021, 7140 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`153 is in the sequence because (1) it is a triangular number, and (2) the product of its digits 153=15 is a hexagonal number.`
	CROSSREFS	`Cf. A000217, A000384.` `Sequence in context: A111484 A119041 A105157 this_sequence A124902 A115677 A100129` `Adjacent sequences: A117307 A117308 A117309 this_sequence A117311 A117312 A117313`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 26 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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