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A131735
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Hexaperiodic 0, 0, 1, 1, 1, 1.
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1
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0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| a(n)=(1/90)*{19*(n mod 6)+4*[(n+1) mod 6]+4*[(n+2) mod 6]+4*[(n+3) mod 6]-11*[(n+4) mod 6]+4*[(n+5) mod 6]}, with n>=0 - Paolo P. Lava (paoloplava(AT)gmail.com), Oct 02 2007
G.f.: -(x^2+1)*x^2/(x-1)/(x^2+x+1)/(x^2-x+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
a(n) = 2/3-(1/2)*cos((1/3)*Pi*n)-(1/6)*3^(1/2)*sin((1/3)*Pi*n)-(1/6)*cos((2/3)*Pi*n)-(1/6)*3^(1/2)*sin((2/3)*Pi*n). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 15 2007
a(n)=A131719(n-1), n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 13 2008
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CROSSREFS
| Sequence in context: A072126 A111113 A095190 * A131736 A152228 A086823
Adjacent sequences: A131732 A131733 A131734 * A131736 A131737 A131738
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KEYWORD
| nonn
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Sep 19 2007
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