id:A117084 - OEIS Search Results

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

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0, 1, 8, 1160, 20501, 30401, 42960, 90480, 131880, 168033, 181056, 208560, 238008, 269400, 302736, 338016, 375240, 414408, 455520, 520833, 590520, 690240, 743016, 770133, 854400, 913008, 943041, 1004565, 1036056, 1068033, 1100496, 1235208 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`42960 is in the sequence because (1) it is a octagonal number, the sum of its digits 4+2+9+6+0=21 is an octagonal number and (3) the product of its digits 42960= 0 is also a octagonal number.`
	CROSSREFS	`Cf. A000567.` `Sequence in context: A047943 A089672 A003767 this_sequence A027668 A095821 A091868` `Adjacent sequences: A117081 A117082 A117083 this_sequence A117085 A117086 A117087`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 17 2006`

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

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