id:A117064 - OEIS Search Results

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Hexagonal numbers for which both the sum of the digits and the product of the digits are also hexagonal numbers.

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0, 1, 6, 231, 780, 1770, 2850, 3003, 4560, 14028, 17205, 20301, 20706, 24090, 24531, 28203, 32640, 37401, 43071, 80601, 96580, 102831, 103740, 112101, 191890, 200661, 201930, 239086, 255970, 286903, 296065, 302253, 303810, 316410, 318003, 332520 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`24531 is in the sequence because (1) it is a hexagonal number, (2)the sum of its digits 2+4+5+3+1=15 is a hexagonal number and (3)the product of its digits 24531=120 is also a hexagonal number.`
	CROSSREFS	`Cf. A000384.` `Sequence in context: A117255 A130644 A084070 this_sequence A112001 A099124 A099129` `Adjacent sequences: A117061 A117062 A117063 this_sequence A117065 A117066 A117067`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 16 2006`

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

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