A046543 - OEIS

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A046543

First numerator and then denominator of the central elements of the 1/3-Pascal triangle (by row).

1, 1, 1, 3, 8, 3, 10, 1, 110, 3, 406, 3, 504, 1, 1892, 1, 7150, 1, 27170, 1, 311168, 3, 1192516, 3, 1528436, 1, 17681020, 3, 68346800, 3, 88256520, 1, 342551190, 1, 1331805570, 1, 5185791600, 1, 20220038300, 1, 78937755820, 1, 308513659740, 1, 1207002506320, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..46.

EXAMPLE

1/1; --> 1 1

1/1 1/1; -->

1/1 1/3 1/1; --> 1 3

1/1 4/3 4/3 1/1; -->

1/1 7/3 8/3 7/3 1/1; --> 8 3

1/1 10/3 5/1 5/1 10/3 1/1;