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Search: id:A059839
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| A059839 |
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n^8 + n^6 + n^4 + n^2 + 1. |
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+0
4
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| 1, 5, 341, 7381, 69905, 406901, 1727605, 5884901, 17043521, 43584805, 101010101, 216145205, 432988561, 820586261, 1483357205, 2574332101, 4311810305, 6999978821, 11054078101, 17030739605, 25664160401, 37908820405, 54989488181
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,1000
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FORMULA
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a(n) = (n^4-n^3+n^2-n+1)*(n^4+n^3+n^2+n+1) = A060884(n)*A053699(n). a(n) = (n^10-1)/(n^2-1), n>1. - Alexander Adamchuk (alex(AT)kolmogorov.com), Apr 13 2006
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PROGRAM
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(PARI) { for (n=0, 1000, f=n^2; write("b059839.txt", n, " ", f^4 + f^3 + f^2 + f + 1); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jun 29 2009]
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CROSSREFS
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Cf. A059830.
Cf. A060884, A053699.
Sequence in context: A029495 A086900 A124477 this_sequence A158105 A006108 A061456
Adjacent sequences: A059836 A059837 A059838 this_sequence A059840 A059841 A059842
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Feb 25 2001
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