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Search: id:A071905
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| A071905 |
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a(n) is the smallest positive integer (which is a polynomial of degree 0) that cannot be obtained using the polynomials {x, x+1, ..., x+n} using each polynomial at most once and the operations +, -, *, /. |
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+0
1
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OFFSET
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0,2
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LINKS
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Index entries for similar sequences
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EXAMPLE
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a(3)=5 because using {x, x+1, x+2, x+3} we can get x+1-x=1, x+2-x=2, x+3-x=3, (x+2-x)*(x+3-(x+1))=4 but we cannot obtain 5 in the same way.
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CROSSREFS
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Cf. A060315, A060316, A071110.
Sequence in context: A115261 A063792 A103600 this_sequence A067573 A103199 A054217
Adjacent sequences: A071902 A071903 A071904 this_sequence A071906 A071907 A071908
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KEYWORD
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hard,more,nice,nonn
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AUTHOR
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Koksal Karakus (karakusk(AT)hotmail.com), Jun 13 2002
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