id:A046062 - OEIS Search Results

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Primes of the form n*phi(n)+1 where phi(n) is the Euler function.

+0
2

2, 3, 7, 13, 43, 41, 157, 109, 193, 313, 487, 337, 241, 661, 433, 937, 641, 881, 1013, 769, 1249, 2053, 1861, 2269, 3121, 1321, 4423, 3037, 3001, 4621, 1873, 6163, 2017, 5441, 3613, 2161, 6553, 4049, 5581 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Listed in order of increasing n.`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	EXAMPLE	`7 because 3*phi(3)+1=7 is prime.`
	CROSSREFS	`Cf. A002618, A046078` `Sequence in context: A056893 A051130 A078749 this_sequence A096263 A007996 A085872` `Adjacent sequences: A046059 A046060 A046061 this_sequence A046063 A046064 A046065`
	KEYWORD	`easy,nice,nonn`
	AUTHOR	`Felice Russo (felice.russo(AT)katamail.com)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research