id:A057202 - OEIS Search Results

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Numbers n such that 2^n - 21 is prime.

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1, 2, 3, 4, 5, 6, 7, 9, 11, 13, 14, 21, 23, 41, 46, 89, 110, 389, 413, 489, 869, 1589, 1713, 2831 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`Do[ If[ PrimeQ[ 2^n - 21 ], Print[ n ] ], {n, 1, 3000} ]`
	CROSSREFS	`Sequence in context: A140297 A062490 A032957 this_sequence A033059 A031876 A008725` `Adjacent sequences: A057199 A057200 A057201 this_sequence A057203 A057204 A057205`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 16 2000`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.