134447

Appears in sequences

• Numerator of Bernoulli(n, -1/9).at n=6A158809
• a(n) = number of tuples (a,b,c,d) of natural numbers a,b,c,d <= n with gcd(a,b)=gcd(b,c)=gcd(c,d)=gcd(d,a)=1.at n=27A256391