id:A121837 - OEIS Search Results

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Least positive j such that Prod_{k=1..n} D(k) + j is prime, where D() are the doublets, A020338.

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2, 9, 7, 7, 17, 7, 29, 17, 19, 23, 23, 13, 29, 79, 19, 89, 97, 53, 43, 347, 127, 127, 149, 29, 167, 331, 379, 61, 59, 167, 199, 557, 107, 113, 43, 191, 439, 41, 263, 227, 109, 71, 227, 137, 149, 409, 271, 53, 157, 79, 503, 103, 461, 137, 587, 233, 491, 73, 367, 233, 449 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Is every term for n>2 always prime?`
	CROSSREFS	`Sequence in context: A013500 A021340 A157350 this_sequence A160439 A137453 A063381` `Adjacent sequences: A121834 A121835 A121836 this_sequence A121838 A121839 A121840`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Aug 28 2006`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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