Catalan numbers/Pascal's triangle: Difference between revisions

=={{header|Icon}} and {{header|Unicon}}==

The following works in both languages. It avoids computing elements in Pascal's triangle

that aren't used.

<lang unicon>link math

procedure main(A)

limit := (integer(A[1])|15)+1

every i := 2*seq(0)\limit do write(right(binocoef(i,i/2)-binocoef(i,i/2+1),30))

end</lang>

Sample run:

<pre>

->cn

1

2

5

14

42

132

429

1430

4862

16796

58786

208012

742900

2674440

9694845

->

</pre>