OFFSET
1,2
COMMENTS
Indices of 0's in A048682. - Sean A. Irvine, Jun 26 2021
FORMULA
max{sqf kernel(C(n, k)} - sqf kernel(C(n, [ n/2 ])) = 0
EXAMPLE
For n=23 both the maximal and central largest-squarefree number dividing the corresponding {C(23,k)} values is 1352078=2*7*13*17*19*23=C(23,12) accidentally. The same 1352078 is the maximal-largest squarefree divisor for C(24,k) values but 1352078=C(24,12)/2. Thus both 23 and 24 are in this sequence.
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Jun 26 2021
STATUS
approved