213759

Appears in sequences

• a(n) = 9*binomial(n,4) = 3*n*(n-1)*(n-2)*(n-3)/8.at n=29A060008
• Sixth column (m=5) of (1,4)-Pascal triangle A095666.at n=25A095668
• Numbers k such that k' = concat(s,t) and k = s*t, where k' is the arithmetic derivative of k.at n=10A272780
• Numbers k such that k and k+1 have different (ordered) prime signatures and d_3(k) = d_3(k+1), where d_3 is A007425.at n=17A333057