52830

Appears in sequences

• Take pairs (a, b), sorted on a, such that T(a)+T(b)=concatenation of a and b, where T(k) is the k-th triangular number A000217(k). Sequence gives values of b.at n=25A096032
• a(n) = 972*n^2 - 1224*n + 414 with n > 0.at n=7A304166
• Numbers m such that Sum_{k=1..m} omega(k) = sigma(m).at n=2A346423