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Search: id:A141721
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| 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3, 2, 7, 8, 5, 8, 7, 2, 3, 0, 3
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Mentioned in A010716.
The sequence and its first differences (5, 1, -3, 3, -1, -5, 1, -3, 3, -1) are both periodic with period length 10.
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FORMULA
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a(n)=a(n-10), period 10 (2, 7, 8, 5, 8, 7, 2, 3, 0, 3).
Also: decimal expansion of the constant 309541367/1111111111. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 15 2008
a(n)=(1/5)*{(n mod 10)-[(n+1) mod 10]+2*[(n+2) mod 10]+3*[(n+4) mod 10]+[(n+5) mod 10]-[(n+6) mod 10]+2*[(n+7) mod 10]-2*[(n+9) mod 10]}, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Sep 19 2008]
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CROSSREFS
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Sequence in context: A102098 A019731 A021363 this_sequence A129603 A102268 A155062
Adjacent sequences: A141718 A141719 A141720 this_sequence A141722 A141723 A141724
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KEYWORD
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nonn,less
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Sep 12 2008
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 15 2008
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