id:A052430 - OEIS Search Results

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Numbers n such that sum of digits and product of digits are both prime.

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1

2, 3, 5, 7, 12, 21, 113, 115, 131, 151, 311, 511, 1112, 1121, 1211, 2111, 11113, 11117, 11131, 11171, 11311, 11711, 13111, 17111, 31111, 71111, 111112, 111121, 111211, 112111, 121111, 211111, 1111115, 1111117, 1111151, 1111171, 1111511, 1111711 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(7)=115 because 1+1+5=7 which is prime and 115=5 which is prime`
	CROSSREFS	`Cf. A000040, A028834, A028842.` `Sequence in context: A048818 A062713 A086108 this_sequence A024784 A060528 A117593` `Adjacent sequences: A052427 A052428 A052429 this_sequence A052431 A052432 A052433`
	KEYWORD	`base,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Mar 14 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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