247801domain: NAppears in sequencesNumbers k such that k divides the (right) concatenation of all numbers <= k written in base 20 (most significant digit on right).at n=24A061949Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.at n=14A304474