74750

Appears in sequences

• Least number 2k such that p^2 divides the numerator of the Bernoulli number B(2k), where p is the n-th irregular prime, A000928(n).at n=13A092681
• a(n) = E(k)*C(n+k,k) = Euler(k)*binomial(n+k,k) for k=4.at n=22A154286
• a(n) = binomial(floor(n/2),4) + (ceiling(n/2)-3)*binomial(floor(n/2),3).at n=52A234277
• Lesser of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=29A323329