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Search: id:A087653
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| A087653 |
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Maximum difference between exponents in n-th cyclotomic polynomial. |
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+0
2
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| 1, 1, 1, 2, 1, 1, 1, 4, 3, 1, 1, 2, 1, 1, 2, 8, 1, 3, 1, 2, 2, 1, 1, 4, 5, 1, 9, 2, 1, 2, 1, 16, 2, 1, 4, 6, 1, 1, 2, 4, 1, 2, 1, 2, 6, 1, 1, 8, 7, 5, 2, 2, 1, 9, 4, 4, 2, 1, 1, 4, 1, 1, 6, 32, 4, 2, 1, 2, 2, 4, 1, 12, 1, 1, 10, 2, 6, 2, 1, 8, 27, 1, 1, 4, 4, 1, 2, 4, 1, 6, 6, 2, 2, 1, 4
(list; graph; listen)
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OFFSET
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1,4
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COMMENT
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Differs from A000190, A003557, A073752.
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EXAMPLE
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Cyc(9) = x^6+x^3+x^0, so a(9) = 3.
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PROGRAM
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(PARI) { mtermgap(pol)=local(p, m):m=0:p=0:for(k=0, poldegree(pol), if(polcoeff(pol, k)!=0, if(m<p, m=p):p=0, p=p+1)):max(m, p)+1 } for(n=1, 200, print1(mtermgap(polcyclo(n))", "))
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CROSSREFS
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Sequence in context: A003557 A073752 A128708 this_sequence A140274 A095231 A141471
Adjacent sequences: A087650 A087651 A087652 this_sequence A087654 A087655 A087656
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KEYWORD
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nonn,easy
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AUTHOR
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Ralf Stephan (ralf(AT)ark.in-berlin.de), Sep 25 2003
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