1099567

Appears in sequences

• a(n) = (1/s(1) + 1/s(2) + ... + 1/s(n+1)) * LCM{1, 2, ..., n}, where s(k) = LCM{1,2,...,k}/k = A002944(k).at n=13A025537
• a(n) = n*(120*n^4 - 480*n^3 + 762*n^2 - 556*n + 155).at n=7A272380