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A084732 Let p be the n-th prime; Cp(x) be the p-th cyclotomic polynomial (x^p-1)/(x-1); a(n) is the first prime Cp(x) after Cp(1). 5
3, 7, 31, 127, 12207031, 8191, 131071, 524287, 11111111111111111111111, 7369130657357778596659, 2147483647, 19013087418896543607659206142267856546797091624826498592389251997 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A084732(k) = A085399(prime(k))

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

a(5)=12207031 because 11 is the 5th prime; C11(x) is composite for x=2,3,4 and C11(5)=12207031 is prime.

CROSSREFS

Cf. A066180, A085399.

Sequence in context: A088552 A000668 A136007 * A123488 A121620 A042271

Adjacent sequences:  A084729 A084730 A084731 * A084733 A084734 A084735

KEYWORD

nonn

AUTHOR

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 14 2003

EXTENSIONS

Edited by Don Reble (djr(AT)nk.ca), Jun 28 2003

STATUS

approved

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Last modified July 27 04:25 EDT 2017. Contains 289841 sequences.