OFFSET
1,5
COMMENTS
Conjecture: a(n) > 1 for n > 4.
EXAMPLE
a(5) = (11*12*13*14*15)/(5!) = 3003.
a(6) = (16*17*18*19*20*21)/(8!) = 969.
MATHEMATICA
Table[a := Product[i, {i, n*(n - 1)/2 + 1, n*(n + 1)/2}]; b := 1; While[ IntegerQ[a/(b + 1)! ], b++ ]; a/b!, {n, 1, 20}] (* Stefan Steinerberger, Mar 14 2006 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, May 17 2004
EXTENSIONS
More terms from Stefan Steinerberger, Mar 14 2006
STATUS
approved