1756160

Appears in sequences

• Numbers m with property that m-th triangular number is a sum of divisors of some k-th triangular number (A175849).at n=36A175850
• Central coefficients of the Riordan matrix ((1-x-x^2)/(1-2x-x^2),(x-x^2-x^3)/(1-2x-x^2)) (A190215).at n=9A190315