6814407600

Appears in sequences

• Denominator of B_{2n}/(-4n), where B_m are the Bernoulli numbers.at n=30A006863
• Largest number k such that the reduced totient function psi(k) = A002174(n).at n=25A143407
• a(n) is the largest number m satisfying lambda(m)=n, or zero if there is no solution, where lambda(m) is Carmichael's lambda function A002322(m).at n=59A270562
• Numbers k >= 3 where a record value of log(phi(k))/log(lambda(k)) is reached, where phi is the Euler totient function (A000010) and lambda is the Carmichael lambda function (A002322).at n=20A328272
• Records in A006863.at n=8A335128