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A130193
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a(0)=1. a(n+1) = a(ceiling(n/a(n))) + 1.
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2
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1, 2, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 4, 5, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 5, 6, 5, 6, 5, 5
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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Records 1,2,3,4,5,... appear at n = 0, 1, 2, 5, 18, 87, 518, 3621,.. which appears to be essentially A094294. - R. J. Mathar, Sep 10 2015
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LINKS
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MAPLE
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option remember;
if n = 0 then
1;
else
1+procname(ceil((n-1)/procname(n-1))) ;
end if;
end proc:
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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