370139domain: NAppears in sequencesDenominators associated with A120031.at n=12A120032Denominators associated with A120031.at n=13A120032a(n) is the numerator of Product_{i=0..n-1} (n-i)^((-1)^ceiling(i/2)).at n=25A337354a(n) is the denominator of Product_{i=0..n-1} (n-i)^((-1)^ceiling(i/2)).at n=23A337355