id:A105988 - OEIS Search Results

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Near-repdigit semiprimes with 7 as repeated digit.

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177, 377, 707, 717, 737, 767, 771, 778, 779, 3777, 4777, 5777, 7277, 7377, 7737, 7747, 7771, 7773, 7778, 7779, 7787, 7977, 8777, 9777, 17777, 37777, 57777, 70777, 77177, 77277, 77677, 77757, 77767, 77771, 277777, 577777, 677777, 707777, 737777 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=377 is a term because 377 is a semiprime and all digits are equal to 7 except one.`
	CROSSREFS	`Sequence in context: A164843 A077786 A147028 this_sequence A083620 A097317 A052461` `Adjacent sequences: A105985 A105986 A105987 this_sequence A105989 A105990 A105991`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 29 2005`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

AT&T Labs Research