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Search: id:A010887
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| A010887 |
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Simple periodic sequence. |
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+0
2
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| 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Partial sums are given by A130486(n)+n+1. - Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Jun 08 2007
1371742/11111111=0,123456781234567812345678... [From Eric Desbiaux (moongerms(AT)wanadoo.fr), Nov 03 2008]
Terms of the simple continued fraction of 2494/(3*sqrt(13493990)-9280). [From Paolo P. Lava (ppl(AT)spl.at), Feb 16 2009]
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FORMULA
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a(n) = 1 + (n mod 8) - Paolo P. Lava (ppl(AT)spl.at), Nov 21 2006
a(n)=1/2*(9-(-1)^n-2*(-1)^(b/4)-4*(-1)^((b-2+2*(-1)^(b/4))/8)) where b=2n-1+(-1)^n. Also a(n)=A010877(n)+1. - G.f.: g(x)=(sum{0<=k<8, (k+1)*x^k})/(1-x^8). Also: g(x)=(8x^9-9x^8+1)/((1-x^8)(1-x)^2). - Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Jun 08 2007
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CROSSREFS
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Cf. A010872, A010873, A010874, A010875, A010876, A010878, A004526, A002264, A002265, A002266.
Sequence in context: A160933 A031076 A053844 this_sequence A101412 A053830 A033929
Adjacent sequences: A010884 A010885 A010886 this_sequence A010888 A010889 A010890
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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).
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