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 A221866 Maximum value achievable for n X n version of Le Monde grid problem, using the original rules. 1
 1, 4, 57, 2473, 349712 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS From Christian Boyer, Apr 18 2013: (Start) The beginning of this version of the game is different from that in A224784: now we start with 1's in two cells (not necessarily adjacent). After that the rules are the same: each new chosen cell is filled with the sum of the neighboring cells. With these rules, the new maximum for 3 X 3 is no longer 44, but 57: 1 2 1 3 7 30 10 20 57 a(1) is no longer defined, but we set it equal to 1. a(2) and a(4) are the same as in A224784, but a(5)-a(8) are different. (End) REFERENCES Eric Angelini and others, A Grid With MAX, Postings to the Math Fun Mailing List, April 14, 2013 onwards. Christian Boyer, A Grid With MAX, Postings to the Math Fun Mailing List, April 18-25, 2013. LINKS EXAMPLE From Christian Boyer, Apr 25 2013: (Start) a(5) = 349712: 1 7 11 33 33 2 4 22 99 165 1 30272 16581 286 550 97477 67204 13662 2508 836 349712 185031 6688 4180 836 a(6) >= 150941453: 1 7 11 33 99 99 2 4 22 66 297 495 1 14105024 49432840 150941453 858 1650 4574593 9530402 25797322 75705032 5016 2508 2859120 1715472 381216 65208 22572 7524 571824 571824 190608 125400 37620 7524 a(7) >= 164912612349. a(8) >= 639561837115046. (End) CROSSREFS Cf. A224784. Sequence in context: A231491 A240887 A209316 * A270881 A246618 A103907 Adjacent sequences: A221863 A221864 A221865 * A221867 A221868 A221869 KEYWORD nonn,more AUTHOR N. J. A. Sloane, Apr 18 2013 EXTENSIONS Value of a(5) and lower bounds for a(6)-a(8) corrected by Christian Boyer, Apr 25 2013 STATUS approved

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Last modified December 2 15:00 EST 2022. Contains 358510 sequences. (Running on oeis4.)