OFFSET
1,2
COMMENTS
The first eight terms and the first two terms of every row are identical to those of A132812.
LINKS
S. M. Khairnar, Anant W. Vyawahare and J. N. Salunkhe, On Smarandache least common multiple ratio, Scientia Magna Vol. 5 (2009), No. 1, 29-36.
Amarnath Murthy, Some Notions on Least Common Multiples, Smarandache Notions Journal, Vol. 12, No. 1-2-3, Spring 2001.
EXAMPLE
Triangle begins:
1;
2, 2;
3, 9, 3;
4, 24, 12, 2;
5, 50, 100, 50, 5;
6, 90, 150, 50, 5, 1;
...
MATHEMATICA
s[_, 0] = 1; s[n_, r_?NumericQ] := LCM @@ Table[n-k+1, {k, 1, r}] / LCM @@ Table[k, {k, 1, r}]; t[n_, r_] := s[n, r]*s[n, r+1]; Table[t[n, r] , {n, 1, 12}, {r, 0, n-1}] // Flatten
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Jean-François Alcover, Apr 23 2014
STATUS
approved