48957

Appears in sequences

• Number of self-converse monoids (semigroups with identity) of order n.at n=8A058132
• a(n) is the smallest x for which the following quotient is an integer: (sigma(x) + ... + sigma(x+n-1))/sigma(x+(x+1)+ ... + (x+n-1)), i.e., sum(sigma(j))/sigma(sum(j)) for n terms summed up was integer.at n=10A091293
• Number of finite sequences of integer partitions with total sum n and all distinct lengths.at n=16A358912