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A130657
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Periodic (7 terms) 1 1 1 1 0 0 0.
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0
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1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| u(n)=u(n+1)=u(n+2)=u(n+3)=1, u(n+4)=u(n+5)=u(n+6)=0 .
a(n)=(1/147)*{-17*(n mod 7)+4*[(n+1) mod 7]+4*[(n+2) mod 7]+25*[(n+3) mod 7]+4*[(n+4) mod 7]+4*[(n+5) mod 7]+4*[(n+6) mod 7]}, with n>=0. - Paolo P. Lava (paoloplava(AT)gmail.com), Jul 18 2007
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CROSSREFS
| Sequence in context: A129564 A025447 A131078 * A084846 A130093 A166446
Adjacent sequences: A130654 A130655 A130656 * A130658 A130659 A130660
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KEYWORD
| nonn
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jun 21 2007
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