! Copyright (c) 2012 Anonymous
-! See http://factorcode.org/license.txt for BSD license.
+! See https://factorcode.org/license.txt for BSD license.
USING: kernel math sequences ;
IN: rosetta-code.catalan-numbers
-! http://rosettacode.org/wiki/Catalan_numbers
+! https://rosettacode.org/wiki/Catalan_numbers
! Catalan numbers are a sequence of numbers which can be defined
! directly: