688551

Appears in sequences

• Triangular numbers n such that sigma(n) is a square number.at n=30A256151
• Terms of A324315 (squarefree integers m > 1 such that if prime p divides m, then the sum of the base p digits of m is at least p) that are also hexagonal numbers (A000384) with index equal to their largest prime factor.at n=26A324319