75479041

Appears in sequences

• Smallest triangular number k such that k-1 has exactly n (not necessarily distinct) prime factors.at n=17A081950
• Smallest triangular number which is one more than the product of n distinct numbers > 1.at n=9A081951
• a(n) = (3*2^(n-1)-1)*(3*2^n-1).at n=12A169720