id:A117083 - OEIS Search Results

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Octagonal numbers for which the product of the digits is also a octagonal number.

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0, 1, 8, 40, 280, 408, 560, 1045, 1160, 1408, 1680, 2640, 3008, 3201, 3400, 3605, 4033, 4720, 5208, 5720, 7105, 7400, 7701, 8008, 8640, 10325, 10680, 11041, 11408, 12160, 14560, 15408, 16280, 18096, 19040, 20008, 20501, 21000, 21505, 22016, 23056 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`27456 is in the sequence because (1) it is a octagonal number and (2) the product of its digits 27456= 1680 is also a octagonal number.`
	CROSSREFS	`Cf. A000567.` `Sequence in context: A068774 A068775 A073955 this_sequence A007987 A092397 A096969` `Adjacent sequences: A117080 A117081 A117082 this_sequence A117084 A117085 A117086`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 17 2006`

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Last modified September 6 09:40 EDT 2008. Contains 143480 sequences.

AT&T Labs Research