Dear SeqFans, Diophantine 4+5x^3=y^2 has 4 solutions (x,y >= 0): x=0,1,4,532 and y=2,3,18,27438. Are there more solutions (x>2*10^9)? thx, zak (17:59) gp > {for(x=0,2*10^9,if(issquare(4+5* x^3,&y),print(x","y)))} 0,2 1,3 4,18 532,27438 (18:46) gp >