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A085399 Let Cn(x) be the n-th cyclotomic polynomial; a(n) is the first prime Cn(x) after Cn(1). 2
2, 3, 7, 5, 31, 3, 127, 17, 73, 11, 12207031, 13, 8191, 43, 151, 257, 131071, 46441, 524287, 61681, 368089, 683, 11111111111111111111111, 241, 705429635566498619547944801, 2731, 262657, 15790321 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

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

CROSSREFS

Cf. A084732, A085398.

Sequence in context: A051860 A155766 A153488 * A063696 A069587 A059843

Adjacent sequences:  A085396 A085397 A085398 * A085400 A085401 A085402

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified April 19 03:33 EDT 2014. Contains 240738 sequences.