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A093919 Consider the triangle in A004736, the k-th term of the n-th row is the LCM of the preceding k terms. 3
1, 2, 2, 3, 6, 6, 4, 12, 12, 12, 5, 20, 60, 60, 60, 6, 30, 60, 60, 60, 60, 7, 42, 210, 420, 420, 420, 420, 8, 56, 168, 840, 840, 840, 840, 840, 9, 72, 504, 504, 2520, 2520, 2520, 2520, 2520, 10, 90, 360, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 11, 110, 990, 3960 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Enrique PĂ©rez Herrero, Rows n=1..100 of triangle, flattened.

EXAMPLE

T(5,3) = 60 because the fifth row of A004736 has the terms {5 4 3 2 1 }, the first three terms being 5, 4 & 3 which have an LCM of 60.

Triangle begins:

1

2 2

3 6 6

4 12 12 12

5 20 60 60 60

6 30 60 60 60 60

7 42 210 420 420 420 420

8 56 168 840 840 840 840 840

MATHEMATICA

T[n_, k_] := LCM @@ Drop[Reverse[Range[n]], (k - n)]; Flatten[ Table[ T[n, k], {n, 11}, {k, n}]] (* Robert G. Wilson v, Apr 27 2004 *)

CROSSREFS

Cf. A004736, A093920, A179661.

Sequence in context: A096115 A289838 A290734 * A179661 A178888 A068424

Adjacent sequences:  A093916 A093917 A093918 * A093920 A093921 A093922

KEYWORD

nonn,tabl

AUTHOR

Amarnath Murthy, Apr 25 2004

EXTENSIONS

Edited by Robert G. Wilson v, Apr 27 2004

STATUS

approved

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Last modified April 18 14:42 EDT 2019. Contains 322209 sequences. (Running on oeis4.)