id:A145604 - OEIS Search Results

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Number of pairs of consecutive integers x, x+1 such that both are prime(n)-smooth but both are not prime(n-1)-smooth.

+0
3

1, 3, 6, 13, 17, 28, 40, 59, 74, 104, 137, 171, 216, 284, 349 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`See A145605 for a triangle of x value. See A145606 for the largest x for each n.`
	FORMULA	`First differences of A002071.`
	CROSSREFS	`Sequence in context: A013563 A009788 A102966 this_sequence A053569 A115283 A078382` `Adjacent sequences: A145601 A145602 A145603 this_sequence A145605 A145606 A145607`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Oct 14 2008`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.