Hello to all of you guys, Is there any of you can help me finding the relationships/patterns of table that I attach at: MERSENNEFORUM.ORG, under the same tittle (file name: puzzle.pdf). (The table consist of 350 rows and 20 columns, contains of numbers 0-9). Thank's. EDIT: Maybe this clues, that I've found so far, can help? Assume: # 1-350 as rows, #1-20 as columns. Number 5 in row 1, column 2 repeated again in row 2, column 2. Number 6 in row 1, column 3/4 repeated again in row 2, column 4. Number 8 in row 1, column 6/8 repeated again in row 2, column 5/8. Number 7 in row 1, column 9 repeated again in row 2, column 11. Number 3 in row 1, column 11 repeated again in row 2, column 12. Number 8 in row 1, column 12 repeated again in row 2, column 9. Number 9 in row 1, column 14/15 repeated again in row 2, column 16. Number 4 in row 1, column 19/20 repeated again in row 2, column 17. Number 8 in row 2, column 5/8 repeated again in row 3, column 8. Number 7 in row 2, column 11 repeated again in row 3, column 11. Number 4 in row 2, column 17 repeated again in row 3, column 18. Number 9 in row 2, column 20 repeated again in row 3, column 20. Number 8 in row 3 column 8 repeated again in row 4, column 6. Number 0 in row 3, column 10 repeated again in row 4, column 12. Number 5 in row 3, column 12 repeated again in row 4, column 10. Number 2 in row 3, column 13 repeated again in row 4, column 13. Number 6 in row 3, column 17 repeated again in row 4, column 18. Number 4 in row 3, column 18 repeated again in row 4, column 20. Number 5 in row 3, column 19 repeated again in row 4, column 19. Temporary conclusion: There's at least one number repeated to next row (if the tables is seen by every four columns), but sometimes there's no repeated numbers at all (such as column 1,2,3,4 row 1 to row 2). PS: Some data were missing in row 165.