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A051173
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Triangular array T read by rows: T(u,v) = lcm(u,v).
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17
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1, 2, 2, 3, 6, 3, 4, 4, 12, 4, 5, 10, 15, 20, 5, 6, 6, 6, 12, 30, 6, 7, 14, 21, 28, 35, 42, 7, 8, 8, 24, 8, 40, 24, 56, 8, 9, 18, 9, 36, 45, 18, 63, 72, 9, 10, 10, 30, 20, 10, 30, 70, 40, 90, 10, 11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 11, 12, 12, 12, 12, 60, 12, 84, 24, 36, 60, 132, 12
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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Triangle begins:
1;
2, 2;
3, 6, 3;
4, 4, 12, 4;
5, 10, 15, 20, 5;
6, 6, 6, 12, 30, 6;
7, 14, 21, 28, 35, 42, 7;
8, 8, 24, 8, 40, 24, 56, 8;
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MAPLE
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MATHEMATICA
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PROG
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(Haskell)
a051173 = lcm
a051173_row n = a051173_tabl !! (n-1)
a051173_tabl = map (\x -> map (lcm x) [1..x]) [1..]
(PARI) T(n, k) = lcm(n, k);
tabl(nn) = for (n=1, nn, for (k=1, n, print1(T(n, k), ", ")); print; ) \\ Michel Marcus, Jul 10 2017
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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