703560domain: NAppears in sequencesa(n) = A000108(n)*A015518(n+1), where A000108 are the Catalan numbers and A015518(n) = 2*A015518(n-1) + 3*A015518(n-2).at n=7A185010Least number k such that k^2 + k^3 is of the form x^2 + y^3 in exactly n ways where x, y > 0.at n=10A273788