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A070042 At these values of n the first, 2nd, 3rd, 4th and 5th cyclotomic polynomials all give prime numbers. 2
1068630, 1441590, 1867950, 3429300, 4084230, 5651730, 6322890, 6770610, 7158630, 7804830, 9437760, 9624270, 13625850, 23194860, 25848840, 26588520, 28714950, 29451840, 32984430, 33650580, 36500910, 38177130, 42856590 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
C1(n)=n-1, C2(n)=n+1, C3(n)=1+n+n^2, C4(n)=1+n^2 and C5(n)=1+n+n^2+n^3+n^4 are all primes.
EXAMPLE
n=1068630: gives quintet of primes of first, 2nd, 3rd, 4th and 5th cyclotomic polynomials: {1068629, 1068631, 1141971145531, 1141970076901, 1304096876879617162402531}.
CROSSREFS
Sequence in context: A193054 A160687 A342328 * A258061 A187125 A237972
KEYWORD
easy,nonn
AUTHOR
Labos Elemer, May 07 2002
EXTENSIONS
More terms from Don Reble, May 11 2002
STATUS
approved

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Last modified March 19 03:33 EDT 2024. Contains 370952 sequences. (Running on oeis4.)