id:A117710 - OEIS Search Results

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Pentagonal numbers for which the product of the digits is also a pentagonal number.

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0, 1, 5, 51, 70, 210, 330, 590, 715, 1001, 1080, 1162, 1520, 1820, 2035, 2380, 2501, 3015, 3290, 3725, 4030, 4510, 5017, 5370, 6112, 6305, 6501, 6700, 6902, 7107, 7740, 8400, 9087, 9560, 9801, 10045, 10292, 10542, 10795, 11051, 11310, 11572, 12105 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`715 is in the sequence because it is a pentagonal number and the product of its digits 715=35 is also a pentagonal number.`
	CROSSREFS	`Cf. A000326.` `Sequence in context: A063803 A106425 A077681 this_sequence A064019 A134938 A068540` `Adjacent sequences: A117707 A117708 A117709 this_sequence A117711 A117712 A117713`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 13 2006`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

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