OFFSET
0,4
EXAMPLE
16$ = 2.3.3.5.11.13. Thus a(16) = 6.
MAPLE
MATHEMATICA
a[n_] := PrimeOmega[n!/Quotient[n, 2]!^2];
Table[a[n], {n, 0, 64}] (* Jean-François Alcover, Jun 18 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Mar 14 2011
STATUS
approved