A057202 - OEIS

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A057202

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

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; refs; listen; history; internal format)

	OFFSET	`1,2`
	MATHEMATICA	`Do[ If[ PrimeQ[ 2^n - 21 ], Print[ n ] ], {n, 1, 3000} ]`
	CROSSREFS	`Sequence in context: A062490 A180711 A032957 * A033059 A031876 A174738` `Adjacent sequences: A057199 A057200 A057201 * A057203 A057204 A057205`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 16 2000`

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Last modified February 16 21:30 EST 2012. Contains 205971 sequences.