A046560 - OEIS

A046560

Distinct numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/3-Pascal triangle (by row).

1, 4, 3, 7, 5, 10, 25, 13, 55, 38, 16, 31, 18, 19, 203, 49, 73, 22, 350, 220, 95, 252, 190, 105, 40, 28, 442, 295, 145, 148, 946, 737, 440, 583, 179, 34, 1683, 1177, 1903, 254, 71, 37, 3575, 2860, 5434, 2665, 325, 250, 6435, 14014, 8099, 3640, 1225, 290, 43

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

1/1; -->

1/1 1/1; -->

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

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

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

1/1 10/3 5/1 5/1 10/3 1/1; --> ...