1160526

Appears in sequences

• For n > 2, a(n) is the smallest triangular number > a(n-1) and congruent to a(n-1) (mod a(n-2)).at n=10A087359
• Cyclops triangular numbers.at n=23A160717
• Triangular numbers T(i) that can be expressed as the sum of 2 positive triangular numbers, T(j)+T(k), and for which i+j+k is a triangular number, where T is A000217.at n=19A343426