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EXAMPLE
| The triangle begins:
1,
2,3,
4,6,9,
-5,-1,5,14,
13,8,7,12,26,
-30,-17,-9,-2,10,36.
Example:
Considering the right-most value of the 4th row: Writing a 10 here instead, the first 4 rows of the triangle become:
1
2,3
4,6,9
-9,-5,1,10
But 1 already occurs earlier in the triangle. So 10 is not the right-most element of row 4.
Checking 11,12,13,14; 14 is the smallest value that can be the right-most element of row 4 and not have any elements of row 4 occur earlier in the triangle. So A136562(4) = 13.
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