170168domain: NAppears in sequencesn*10^5-1, n*10^5-3, n*10^5-7 and n*10^5-9 are all prime.at n=25A064979Number of fixed polyominoes with n cells of which no four are equally spaced on a straight line.at n=18A065068Indices of consecutive maxima in A214123.at n=20A214124