Pascal's triangle

[roadrunner]

Function pascal(x) returns a level of Pascal's triangle.

Example:

pascal(7) returns {1,7,21,35,35,21,7,1}
the 7th level of Pascal's triangle

Code:

#pragma mode(separator(.,;) integer(h32))

EXPORT pascal(x)
BEGIN
 case
  if x < 1 then {1};end;
  if x < 2 then {1,1}; end;
 default
  concat(1,execon("&1+&2",pascal(x−1)),1);
 end;
END;