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A137761
Distinct numbers in writing first denominator and then numerator (left to right) of Leibniz's harmonic-like triangle.
8
1, 2, 3, 6, 5, 4, 12, 7, 20, 9, 30, 31, 11, 60, 49, 42, 13, 105, 71, 140, 209, 8, 56, 15, 168, 97, 280, 351, 72, 17, 252, 127, 504, 545, 630, 1471, 10, 90, 19, 360, 161, 840, 799, 1260, 2561, 110, 21, 495, 199, 1320, 1121, 2310, 4159, 2772, 10625
OFFSET
1,2
EXAMPLE
1/1; --> 1
1/2, 1/2; --> 2
1/3, 5/6, 1/3; --> 3 6 5
1/4, 7/12, 7/12, 1/4;
1/5, 9/20, 31/30, 9/20, 1/5;
KEYWORD
frac,nonn,tabf,less
AUTHOR
Mohammad K. Azarian, Feb 11 2008
STATUS
approved