2124476931domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(108).at n=21A041194Numerators of continued fraction convergents to sqrt(432).at n=21A041822Semiperimeter of the n-th Heronian triangle.at n=16A151961a(n) = 2*a(n-1)^2/3-3 with a(0)=6.at n=4A213680