642600domain: NAppears in sequencesNumber of simplicial 3-clusters with n cells.at n=11A007173tan(arctanh(x)-log(x+1)) = 1/2!*x^2 + 6/4!*x^4 + 150/6!*x^6 + 7560/8!*x^8...at n=5A013296Numbers k such that k | sigma_11(k) - phi(k)^11.at n=36A055705Magic products of 5 X 5 multiplicative magic squares.at n=28A111031