2447408809domain: NAppears in sequencesNumbers m such that 10*m^2 - 6 is a square.at n=12A221875a(n) = 6*a(n-2) + a(n-4), where a(0) = 3, a(1) = 5, a(2) = 19, a(3) = 31.at n=23A228471Denominators of continued fraction convergents to sqrt(10)/2 = sqrt(5/2) = A020797 + 1.at n=36A295334