id:A105991 - OEIS Search Results

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Semiprimes consisting of digit 0 and 1 only.

+0
1

10, 111, 1011, 1101, 1111, 11101, 11111, 110111, 111011, 111101, 1111111, 11011111, 11111011, 110111111, 111011111, 111110111, 11101111111, 11111111111, 110111111111, 111101111111, 111111101111, 111111111011 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`This includes repunit semiprimes also.`
	EXAMPLE	`a(3)=1011 is a term because 1011 is a semiprime and contain digits 0 and 1 only.`
	CROSSREFS	`Sequence in context: A100751 A004290 A159551 this_sequence A103581 A087545 A078252` `Adjacent sequences: A105988 A105989 A105990 this_sequence A105992 A105993 A105994`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 29 2005`

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

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