1119638520

Appears in sequences

• Numbers k such that (k+1)*(2*k+1) is a perfect square.at n=6A078522
• Numbers occurring in three Pythagorean triples of the form: odd: a, (a^2-1)/2, (a^2+1)/2 or even: a, a^2/4-1, a^2/4+1.at n=12A111766
• List of pairs of consecutive integers such that one of them is a square and their sum is also a square.at n=24A331261