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A120888
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Triangle read by rows: T(n,k)=GCD(k,floor(n/k)) (1<=k<=n).
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1
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1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 3, 2, 1, 1, 1, 1, 1, 1, 1, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,8
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EXAMPLE
| Triangle starts:
1;
1,1;
1,1,1;
1,2,1,1;
1,2,1,1,1;
1,1,1,1,1,1;
1,1,1,1,1,1,1;
1,2,1,2,1,1,1,1;
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MAPLE
| T:=proc(n, k) if k<=n then gcd(k, floor(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 (deutsch(AT)duke.poly.edu), Jul 24 2006
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CROSSREFS
| Cf. A120889.
Sequence in context: A105242 A114116 A054532 * A031230 A111616 A113120
Adjacent sequences: A120885 A120886 A120887 * A120889 A120890 A120891
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KEYWORD
| nonn,tabl
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AUTHOR
| Leroy Quet, Jul 12 2006
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EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 24 2006
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