-654729075

Appears in sequences

• 2-adic factorial function.at n=19A055634
• Row 4 of array in A288580.at n=19A092398
• a(n) = n!*b(n) where b(n) = (n-4)*b(n-2)/(n*(n-1)) and b(0) = b(1) = 1.at n=23A123022
• Q(2,n), where Q(m,k) is defined in A127080 and A127137.at n=19A127144