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Search: id:A141519
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| A141519 |
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A001469,Genocchi last digit. Also mix -(today period 5:repeat 1, 3, 5, 7, 9) , A139788. Period 10:repeat -1, 1, -3, 7, -5, 3, -7, 9, -9, 5 . |
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+0
1
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| -1, 1, -3, 7, -5, 3, -7, 9, -9, 5, -1, 1, -3, 7, -5, 3, -7, 9, -9, 5, -1, 1, -3, 7, -5, 3, -7, 9, -9, 5, -1, 1, -3, 7, -5, 3, -7, 9, -9, 5
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Special order for 1, -1, 3, -3, 5, -5, 7, -7, 9, -9 .
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FORMULA
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a(n)=(1/5)*{3*(n mod 10)-7*[(n+1) mod 10]+9*[(n+2) mod 10]-8*[(n+3) mod 10]+5*[(n+4) mod 10]-4*[(n+5) mod 10]+6*[(n+6) mod 10]-5*[(n+7) mod 10]+2*[(n+8) mod 10]-[(n+9) mod 10]}, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Aug 25 2008]
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CROSSREFS
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Sequence in context: A132742 A021910 A094124 this_sequence A029946 A021731 A084726
Adjacent sequences: A141516 A141517 A141518 this_sequence A141520 A141521 A141522
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KEYWORD
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sign,uned
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Aug 11 2008
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