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A046538
First denominator and then numerator of the 1/3-Pascal triangle (by row), excluding 1's and 3's.
0
4, 4, 7, 8, 7, 10, 5, 5, 10, 13, 25, 10, 25, 13, 16, 38, 55, 55, 38, 16, 19, 18, 31, 110, 31, 18, 19, 22, 73, 49, 203, 203, 49, 73, 22, 25, 95, 220, 350, 406, 350, 220, 95, 25, 28, 40, 105, 190, 252, 252, 190, 105, 40, 28, 31, 148, 145, 295, 442, 504, 442, 295
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 4
1/1 7/3 8/3 7/3 1/1; --> 7 8 7
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: A238391 A049647 A263619 * A353713 A107432 A198991
KEYWORD
tabf,nonn,less
EXTENSIONS
Data corrected and extended by Sean A. Irvine, Apr 13 2021
STATUS
approved