

A084732


Let p be the nth prime; Cp(x) be the pth cyclotomic polynomial (x^p1)/(x1); a(n) is the first prime Cp(x) after Cp(1).


5



3, 7, 31, 127, 12207031, 8191, 131071, 524287, 11111111111111111111111, 7369130657357778596659, 2147483647, 19013087418896543607659206142267856546797091624826498592389251997, 7538867501749984216983927242653776257689563451, 26656068987980386414408582952871386493955339704241
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OFFSET

1,1


LINKS



FORMULA



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



KEYWORD

nonn


AUTHOR

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


EXTENSIONS



STATUS

approved



