673596000

Appears in sequences

• a(n) = n^2*(n+1)*(n+2)!/48.at n=7A037959
• Number of primitive (=aperiodic) n-bead necklaces with colored beads of exactly 9 different colors.at n=3A254081
• E.g.f.: Product_{m>0} 1/(1 - x^m + x^(2*m)/2!).at n=11A293302