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 A019328 Cyclotomic polynomials at x=10. 13
 9, 11, 111, 101, 11111, 91, 1111111, 10001, 1001001, 9091, 11111111111, 9901, 1111111111111, 909091, 90090991, 100000001, 11111111111111111, 999001, 1111111111111111111, 99009901, 900900990991, 9090909091, 11111111111111111111111, 99990001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A138940 for indices n for which a(n) is prime. - M. F. Hasler, Jan 09 2015 LINKS Table of n, a(n) for n=1..24. Index entries for cyclotomic polynomials, values at X MAPLE with(numtheory, cyclotomic); f := n->subs(x=10, cyclotomic(n, x)); seq(f(i), i=0..64); PROG (PARI) A019328(n)=polcyclo(n, 10) \\ Simplified by M. F. Hasler, Jan 09 2015 CROSSREFS Sequence in context: A058304 A359457 A027727 * A119786 A147429 A147461 Adjacent sequences: A019325 A019326 A019327 * A019329 A019330 A019331 KEYWORD nonn AUTHOR Simon Plouffe STATUS approved

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Last modified June 6 01:24 EDT 2023. Contains 363138 sequences. (Running on oeis4.)