A046578 - OEIS

A046578

First denominator and then numerator of the elements to the right of the central elements of the 1/4-Pascal triangle (by row), excluding 1's and 4's.

5, 9, 19, 13, 8, 17, 2, 35, 49, 21, 119, 2, 35, 25, 259, 189, 95, 29, 112, 71, 31, 33, 2, 483, 183, 102, 157, 37, 2, 849, 285, 565, 2, 97, 41, 2, 1815, 2, 1419, 1705, 759, 235, 45, 1617, 4543, 616, 2, 497, 70, 49, 3432, 11011, 7007, 2, 1729, 2, 637, 329, 53, 24739, 2, 9009

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..62.

EXAMPLE

1/1; -->

1/1 1/1; -->

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

1/1 5/4 5/4 1/1; --> 5

1/1 9/4 5/2 9/4 1/1; --> 9

1/1 13/4 19/4 19/4 13/4 1/1; --> ...