243937domain: NAppears in sequencesLet M(n) be the n X n matrix m(i,j)=min(i,j) for 1<=i,j<=n then a(n) is the trace of M(n)^(-8).at n=20A114360Number of distinct intersections among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.at n=35A331702