490752domain: NAppears in sequencesa(n) is the smallest number m such that phi(m)+sigma(m)=n*pi(m).at n=37A145747Molecular topological indices of the complete tripartite graphs K_{n,n,n}.at n=23A192491Expansion of e.g.f. 1 / ( 1 - Sum_{k>=0} x^(2*k+3) / (2*k+3) ).at n=10A365980