[math-fun] 6x6 pandiag. multiplic. squares ARE NOT impossible!

A better 6x6 pandiagonal multiplicative square. With always the 2x2 and 3x3 sub-squares feature. 14 2100 63 350 84 1575 4410 15 980 90 735 20 50 588 225 98 300 441 126 525 28 3150 21 700 490 60 2205 10 2940 45 450 147 100 882 75 196 Using 2^ * 3^ * 5^ * 7^ integers, versus 2^ * 3^ in the previous example. Max nb = 4,410, vs 46,656. P = 8.58 E+13, vs 1.02 E+14. Christian.