6290064domain: NAppears in sequencesLeast number expressible as a^2 + p b^2 with positive integers a,b, for each prime p <= prime(n) = A000040(n).at n=13A155714Number of 3Xn 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=17A302461