24969660domain: NAppears in sequencesAppending a digit to n^2 gives another perfect square.at n=33A031150Number of different compositions of the ladder graph L_n.at n=10A078469Numbers n such that 10*n^2+4 is a square.at n=4A239365Denominators of continued fraction convergents to sqrt(10)/2 = sqrt(5/2) = A020797 + 1.at n=29A295334