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Search: id:A134430
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| A134430 |
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Period 4: repeat 1, -2, -2, 1. |
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+0
1
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| 1, -2, -2, 1, 1, -2, -2, 1, 1, -2, -2, 1, 1, -2, -2, 1, 1, -2, -2, 1, 1, -2, -2, 1, 1, -2, -2, 1, 1, -2, -2, 1
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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Binomial transform of A134813.
a(n)=-(1/12)*{(n mod 4)+10*[(n+1) mod 6]+[(n+2) mod 6]-8*[(n+3) mod 6]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jul 03 2008
a(n)=-1/2+[3/4+(3/4)*I]*I^n+[3/4-(3/4)*I]*(-I)^n, with n>=0 and I=sqrt(-1) - Paolo P. Lava (ppl(AT)spl.at), Jul 17 2008
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CROSSREFS
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Cf. A014695.
Sequence in context: A026605 A073783 A130658 this_sequence A014695 A071017 A112049
Adjacent sequences: A134427 A134428 A134429 this_sequence A134431 A134432 A134433
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KEYWORD
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sign
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jan 31 2008
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