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A046553
First denominator and then numerator of each element of the 1/3-Pascal triangle (by row), excluding 3's.
0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 4, 1, 1, 1, 1, 7, 8, 7, 1, 1, 1, 1, 10, 1, 5, 1, 5, 10, 1, 1, 1, 1, 13, 25, 1, 10, 25, 13, 1, 1, 1, 1, 16, 38, 55, 55, 38, 16, 1, 1, 1, 1, 19, 1, 18, 1, 31, 110, 1, 31, 1, 18, 19, 1, 1, 1, 1, 22, 73, 1, 49, 203, 203, 1
OFFSET
1,14
EXAMPLE
1/1; -> 1 1
1/1 1/1; -> 1 1 1 1
1/1 1/3 1/1; -> 1 1 1 1 1
1/1 4/3 4/3 1/1; -> 1 1 4 4 1 1
1/1 7/3 8/3 7/3 1/1;
1/1 10/3 5/1 5/1 10/3 1/1;
1/1 13/3 25/3 10/1 25/3 13/3 1/1;
1/1 16/3 38/3 55/3 55/3 38/3 16/3 1/1; ...
CROSSREFS
Cf. A046534.
Sequence in context: A057270 A057278 A010303 * A046552 A155454 A143484
KEYWORD
tabf,nonn,frac,less
EXTENSIONS
Corrected and extended by Sean A. Irvine, Apr 13 2021
STATUS
approved