39657956492domain: NAppears in sequencesa(n) = 14*a(n-1) - a(n-2) with a(0) = 0, a(1) = 2.at n=10A011944Denominators of continued fraction convergents to sqrt(12).at n=19A041017Denominators of continued fraction convergents to sqrt(108).at n=25A041195Expansion of (1-x)^2/((1+x^2)*(1-4*x+x^2)).at n=19A099488