58503375

Appears in sequences

• a(n) = Product_{ceiling(n/2) <= k <= n, gcd(k,n)=1} k.at n=25A124442
• Comtet's expansion of the e.g.f. (sqrt(1 + sqrt(8*s)) - sqrt(1 - sqrt(8*s)))/ sqrt(8*s * (1 - 8*s)).at n=6A334907