183585domain: NAppears in sequencesNumber of nX7 0..1 arrays with every element equal to 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=8A299611Numbers k such that the abundancy index of sigma(k) divided by the abundancy index of d(k) equals a whole number.at n=24A392507