id:A157467 - OEIS Search Results

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Primes : if Sqrt[p-1]-1 are also primes.

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17, 37, 197, 401, 577, 2917, 5477, 7057, 8101, 12101, 22501, 32401, 50177, 52901, 57601, 69697, 72901, 80657, 98597, 122501, 147457, 176401, 193601, 197137, 215297, 324901, 352837, 414737, 427717, 454277, 547601, 739601, 746497, 846401 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Sqrt[17-1]-1=3(prime), Sqrt[37-1]-1=5(prime), ...`
	MATHEMATICA	`lst={}; Do[p=Prime[n]; r=Sqrt[p-1]-1; If[PrimeQ[r], AppendTo[lst, p]], {n, 4*8!}]; lst`
	CROSSREFS	`Cf. A127435, A127436` `Sequence in context: A052292 A154301 A057185 this_sequence A093343 A153685 A121710` `Adjacent sequences: A157464 A157465 A157466 this_sequence A157468 A157469 A157470`
	KEYWORD	`nonn`
	AUTHOR	`Vladimir Orlovsky (4vladimir(AT)gmail.com), Mar 01 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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