53533

Appears in sequences

• a(n) = [ 3rd elementary symmetric function of {log(k)} ], k = 2,3,...,n.at n=25A025203
• Reverse of smallest prime factor of k = largest prime factor of k+1; a(1)=1.at n=39A071392
• Triangle read by rows: T(n,m) = Sum_{k=0..n} C(k-1,m-1)*C(k,m-1)*C(n+k-1,n-k)/m.at n=39A257142
• a(n) = Sum_{k=1..n} sigma_2(k)^2.at n=10A356535
• Numbers k that are the maximum of integers |k3|, |k5|, |k7| with |k3| + |k5| + |k7| > 0, and |k3*sqrt(3) + k5*sqrt(5) + k7*sqrt(7)| is smaller than for any smaller value of k.at n=13A379918