A046544 - OEIS

A046544

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

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

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OFFSET

1,3

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; --> 3 1

1/1 4/3 4/3 1/1;

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

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