325221

Appears in sequences

• Triangular numbers such that the product of digits is also a (positive) triangular number.at n=28A069077
• Smallest triangular number beginning with the n-th triangular number other than itself.at n=24A072517
• Triangular numbers for which the product of the digits is a nonzero hexagonal number.at n=15A185211
• Triangular numbers whose binary conversion, read in decimal, is prime.at n=24A227028
• Smallest triangular numbers whose decimal expansion begins (nontrivially) with n-th triangular number.at n=24A229235