1385280
domain: N
Appears in sequences
- Highly composite triangular numbers: triangular numbers where the number of divisors increases to a record.at n=17A076711
- Triangular numbers that are the difference of nonnegative cubes.at n=29A129965
- Triangular numbers t such that both distances from t to two nearest squares are perfect squares.at n=6A234336
- Triangular numbers k such that phi(k) is a square number, where phi(k) is the Euler totient function (A000010).at n=31A287473