1568931840domain: NAppears in sequencesa(n) = 2^n * Lucas(n) * (n-1)!.at n=8A097632a(n) = 2^(n-3)*binomial(n,4).at n=21A213432Denominators of the coefficients in a series for the angles in the Spiral of Theodorus.at n=10A351862Prime shadows of colossally abundant numbers, A004490.at n=36A353561