176364domain: NAppears in sequencesNumbers k such that sigma(k) = 2*sigma(k+1).at n=31A163193Irregular triangle giving on row n all those antiderivatives k of the n-th factorial, for which bigomega(k) > 2.at n=7A377987Numbers k such that sigma(k) = psi(k) + tau(k)^3.at n=39A390297