login
A046549
First numerator and then denominator of the elements to the right of the central elements of the 1/3-Pascal triangle (by row), excluding 1's and 3's.
0
4, 7, 5, 10, 25, 13, 55, 38, 16, 31, 18, 19, 203, 49, 73, 22, 350, 220, 95, 25, 252, 190, 105, 40, 28, 442, 295, 145, 148, 31, 946, 737, 440, 583, 179, 34, 1683, 1177, 1903, 254, 71, 37, 3575, 2860, 5434, 2665, 325, 250, 40, 6435, 14014, 8099, 3640, 1225, 290
OFFSET
1,1
EXAMPLE
1/1; -->
1/1 1/1; -->
1/1 1/3 1/1; -->
1/1 4/3 4/3 1/1; --> 4
1/1 7/3 8/3 7/3 1/1; --> 7
1/1 10/3 5/1 5/1 10/3 1/1; --> 5 10
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: A248932 A341672 A346836 * A331138 A051544 A271304
KEYWORD
tabf,nonn,frac,less
EXTENSIONS
Corrected and extended by Sean A. Irvine, Apr 13 2021
STATUS
approved