id:A105990 - OEIS Search Results

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Near-repdigit semiprimes with 9 as repeated digit.

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299, 699, 799, 899, 939, 949, 959, 979, 989, 993, 995, 998, 5999, 6999, 7999, 9299, 9599, 9799, 9899, 9939, 9959, 9969, 9979, 9989, 9991, 9993, 9995, 9997, 9998, 19999, 29999, 69999, 91999, 92999, 93999, 95999, 99299, 99599, 99899, 99919, 99949 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=699 is a term because 699 is a semiprime and all digits are equal to 9 except one.`
	CROSSREFS	`Sequence in context: A037043 A129037 A064908 this_sequence A160484 A091028 A014369` `Adjacent sequences: A105987 A105988 A105989 this_sequence A105991 A105992 A105993`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 29 2005`

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

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