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A120889
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Triangle read by rows: T(n,k)=GCD(k,ceiling(n/k)) (1<=k<=n).
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1
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1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 3, 2, 1, 2, 1, 1, 2, 3, 2, 1, 2, 1, 1, 1, 1, 3, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 4, 1, 3, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 4, 1, 3, 1, 2, 1, 2, 1, 2, 1, 1
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OFFSET
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1,5
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LINKS
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Table of n, a(n) for n=1..105.
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EXAMPLE
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Triangle starts:
1;
1,1;
1,2,1;
1,2,1,1;
1,1,1,2,1;
1,1,1,2,1,1;
1,2,3,2,1,2,1,1;
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MAPLE
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T:=proc(n, k) if k<=n then gcd(k, ceil(n/k)) else 0 fi end: for n from 1 to 16 do seq(T(n, k), k=1..n) od; # yields sequence in triangular form - Emeric Deutsch, Jul 26 2006
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CROSSREFS
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Cf. A120888.
Sequence in context: A183014 A030382 A192004 * A092523 A120891 A034002
Adjacent sequences: A120886 A120887 A120888 * A120890 A120891 A120892
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KEYWORD
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nonn,tabl
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AUTHOR
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Leroy Quet, Jul 12 2006
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EXTENSIONS
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More terms from Emeric Deutsch, Jul 26 2006
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STATUS
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approved
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