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Search: id:A154815
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| A154815 |
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Period 6: repeat 8, 7, 4, 5, 2, 1. |
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+0
2
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| 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1, 8, 7, 4, 5, 2, 1
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Obtained through reversion of the period in A153990, or by taking a half period of A154811.
Shares digits with other 6-periodic sequences, see the list in A153130.
Also the decimal expansion of the constant 97169/111111 [R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 23 2009]
Terms of the simple continued fraction of 2710/(sqrt(4579599)-1807). [From Paolo P. Lava (ppl(AT)spl.at), Feb 17 2009]
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FORMULA
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a(n)=(1/15)*{-13*(n mod 6)+7*[(n+1) mod 6]+12*[(n+2) mod 6]+2*[(n+3) mod 6]+12*[(n+4) mod 6]+7*[(n+5) mod 6]}, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Jan 16 2009]
a(n) = (8*A153990(n)) mod 9.
G.f.: (8+7x+4x^2+5x^3+2x^4+x^5)/((1-x)(1+x)(1+x+x^2)(x^2-x+1)). [R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 23 2009]
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CROSSREFS
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Sequence in context: A131081 A158288 A072102 this_sequence A085848 A008960 A077744
Adjacent sequences: A154812 A154813 A154814 this_sequence A154816 A154817 A154818
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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), Jan 15 2009
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 23 2009
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