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Search: id:A131015
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| A131015 |
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Period 12: repeat 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4. |
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+0
1
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| 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2, 3, 3, 4, 1, 1, 3, 2, 2, 1, 4, 4, 2
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Also the decimal expansion of 1018994/9000009. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
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FORMULA
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a(n)=(1/132)*{38*(n mod 12)-6*[(n+1) mod 12]+5*[(n+2) mod 12]-6*[(n+3) mod 12]+27*[(n+4) mod 12]+5*[(n+5) mod 12]-28*[(n+6) mod 12]+16*[(n+7) mod 12]+5*[(n+8) mod 12]+16*[(n+9) mod 12]-17*[(n+10) mod 12]+5*[(n+11) mod 12]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Sep 28 2007
G.f.: (1+2x^2-x^3-x^5+4x^6)/((1-x)(1+x^2)(1-x^2+x^4)). a(n)=a(n-1)-a(n-6)+a(n-7). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
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CROSSREFS
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Sequence in context: A164585 A154364 A050604 this_sequence A130195 A071048 A098054
Adjacent sequences: A131012 A131013 A131014 this_sequence A131016 A131017 A131018
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KEYWORD
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nonn,easy
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Sep 22 2007
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EXTENSIONS
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More periods from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009
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