id:A117682 - OEIS Search Results

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Prime numbers for which the product of the digits is a triangular number.

+0
3

3, 11, 13, 23, 31, 37, 47, 53, 59, 61, 73, 101, 103, 107, 109, 113, 131, 137, 149, 173, 227, 229, 251, 263, 307, 311, 317, 353, 401, 409, 419, 433, 491, 503, 509, 521, 601, 607, 661, 701, 709, 769, 809, 853, 907, 941, 967, 1009, 1013, 1019, 1021, 1031, 1033 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`59 is in the sequence because (1) it is a prime number, and (2) the product of its digits 5*9=45 is a triangular number.`
	CROSSREFS	`Cf. A000217.` `Sequence in context: A063621 A066594 A116438 this_sequence A045429 A019374 A033680` `Adjacent sequences: A117679 A117680 A117681 this_sequence A117683 A117684 A117685`
	KEYWORD	`nonn,base`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 27 2006`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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