id:A135433 - OEIS Search Results

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a(n) = number of primes that are the initial prime of a twin prime pair that are > (10^n)*(10^n+1) and < (10^n)*(10^n+1)+2*(10^n)+2.

+0
1

2, 0, 3, 16, 75, 495, 3440, 25185 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`3 and 5 are twin primes as are 5 and 7, 3 and 5 > 2 and < 6 so a(0)=2`
	CROSSREFS	`Sequence in context: A121065 A077928 A105418 this_sequence A104774 A087263 A099894` `Adjacent sequences: A135430 A135431 A135432 this_sequence A135434 A135435 A135436`
	KEYWORD	`hard,nonn`
	AUTHOR	`Pierre CAMI (pierrecami(AT)tele2.fr), Dec 13 2007`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.