Slightly better, 128493518, with an interesting path: 1 2 6 18 54 54 1 4 12 36 162 270 7693637 15387286 42350640 128493518 468 900 2495232 5198400 21764902 64374562 2736 1368 1559520 935712 207936 35568 12312 4104 311904 311904 103968 68400 20520 4104 And repeating numbers in each corner (1, 54, 4104, 311904) Christian. -----Message d'origine----- De : math-fun-bounces@mailman.xmission.com [mailto:math-fun-bounces@mailman.xmission.com] De la part de Christian Boyer Envoyé : mardi 16 avril 2013 18:44 À : 'math-fun' Objet : Re: [math-fun] A grid with MAX Right, we will see better numbers. My current best result for 6x6 is 128493464. Christian.