50320119025domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(15).at n=24A041023a(n) = 8*a(n-1) - a(n-2), a(0)=1, a(-1)=1.at n=12A070997a(n)*a(n+3) - a(n+1)*a(n+2) = 3, given a(0)=a(1)=1, a(2)=4.at n=25A080871Numerators in continued fraction expansion of sqrt(3/5).at n=24A145542