OFFSET
1,3
FORMULA
a(n) = (Product_{j=n*(n-1)/2+1..n*(n+1)/2} j) / lcm(n*(n-1)/2+1, n*(n-1)/2+2, ..., n*(n+1)/2). - Jon E. Schoenfield, Mar 17 2018
EXAMPLE
a(5) = 6 = (11*12*13*14*15)/lcm(11,12,13,14,15) = 360360/60060.
MAPLE
a:=n->product(j, j=n*(n-1)/2+1..n*(n+1)/2)/lcm(seq(j, j=n*(n-1)/2+1..n*(n+1)/2)): seq(a(n), n=1..27); # Emeric Deutsch, Aug 07 2005
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 03 2004
EXTENSIONS
More terms from Emeric Deutsch, Aug 07 2005
STATUS
approved