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A076817
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Let u(1)=u(2)=1, u(n)=(3^floor(u(n-1)/2)+1)/u(n-2); then a(n)=10*u(n).
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0
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10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20, 10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..72.
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FORMULA
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12-periodic with period (10, 10, 20, 40, 50, 25, 8, 8, 25, 50, 40, 20)
a(n)=1/132*{161*(n mod 12)+271*[(n+1) mod 12]+161*[(n+2) mod 12]-224*[(n+3) mod 12]-136*[(n+4) mod 12]+51*[(n+5) mod 12]+238*[(n+6) mod 12]+326*[(n+7) mod 12]-59*[(n+8) mod 12]-169*[(n+9) mod 12]-59*[(n+10) mod 12]+51*[(n+11) mod 12} with n>=0 - Paolo P. Lava, Nov 29 2006
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CROSSREFS
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Sequence in context: A040091 A168461 A022093 * A200984 A185993 A109051
Adjacent sequences: A076814 A076815 A076816 * A076818 A076819 A076820
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre, Nov 24 2002
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STATUS
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approved
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