id:A064361 - OEIS Search Results

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Numbers n such that prime(n)^2 + n is prime.

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1, 2, 4, 12, 18, 22, 30, 42, 52, 82, 84, 126, 142, 174, 178, 180, 186, 192, 198, 216, 220, 240, 252, 262, 298, 316, 348, 382, 400, 406, 412, 438, 478, 480, 492, 520, 522, 532, 546, 576, 604, 610, 630, 700, 730, 744, 784, 790, 832, 840, 852, 862, 904, 916, 940 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`Select[ Range[ 1000 ], PrimeQ[ Prime[ # ]^2 + # ] & ]`
	PROGRAM	`(PARI) j=[]; for(n=1, 1500, if(isprime(prime(n)^2+n), j=concat(j, n))); j`
	CROSSREFS	`Sequence in context: A085931 A125885 A067929 this_sequence A064407 A052289 A024872` `Adjacent sequences: A064358 A064359 A064360 this_sequence A064362 A064363 A064364`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Sep 26 2001`

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

AT&T Labs Research