89419819domain: NAppears in sequencesa(n) = 6*a(n-1) + a(n-2) for n > 1, with a(0) = a(1) = 1.at n=11A015451Numerators of convergents to 3/(1 + sqrt(10)).at n=31A093611Numbers m such that 10*m^2 + 6 is a square.at n=10A221874Denominators of continued fraction convergents to sqrt(10)/2 = sqrt(5/2) = A020797 + 1.at n=31A295334