for(N=1,10000000,print(sum(n=1,N,1.0/n)))

for(N=1,10000000,print((6*sum(n=1,N,1./n^2))^(0.5)))

for(N=1,10000000,print(sum(n=1,N,1./n^3)))

for(N=1,10000000,if(isprime(N),print(sum(n=1,N,1.*isprime(n)/n)),))