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Search: id:A141355
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OFFSET
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0,3
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COMMENT
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a(2n+1)-a(2n)= 0, 6, 42, 342, 2730 =6*A015565
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FORMULA
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a(4n+1)=2a(4n)-1, a(4n+2)=4a(4n+1)+1, a(4n+3)=2a(4n+2)+1, a(4n+4)=4a(4n+3)-1.
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CROSSREFS
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Sequence in context: A006382 A055113 A129015 this_sequence A097056 A092358 A079029
Adjacent sequences: A141352 A141353 A141354 this_sequence A141356 A141357 A141358
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KEYWORD
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nonn,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Aug 03 2008
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