471905281

Appears in sequences

• Smallest triangular number k such that k-1 has exactly n (not necessarily distinct) prime factors.at n=16A081950
• a(n) is the largest Carmichael number of the form prime(n)*prime(n')*prime(n") with n < n' < n", or 0 if no such number exists.at n=10A141706
• The largest 3-Carmichael number that is divisible by the n-th odd prime.at n=9A290485
• Triangular Carmichael numbers.at n=18A290945