51828

Appears in sequences

• Decimal part of a(n)^(1/5) starts with a 'nine digits' anagram.at n=26A034280
• A014486-indices of symmetric binary trees.at n=31A083940
• Minimum value unattainable as the sum of 4 attained values of a*b*c with a,b,c 0..n integers.at n=24A225266
• G.f.: Sum_{n>=0} x^n * (1 + x^n)^n / (1 - x^(n+1))^(n+1).at n=61A325046
• For 1<=x<=n, 1<=y<=n with gcd(x,y)=1, write 1 = gcd(x,y) = u*x+v*y with u,v minimal; a(n) = m^2*s, where s is the population variance of the values of |u| and m is the number of such values.at n=14A345694