Return tuple of list in recursion function

Return tuple of list in recursion function

References

Reference NO 1

http://stackoverflow.com/questions/8423571/f-writing-a-function-that-builds-a-list-of-tuples-recursively-a-syntax-error

Reference NO 2

http://stackoverflow.com/questions/577940/how-can-i-make-this-python-recursive-function-return-a-flat-list

Reference NO 3

http://stackoverflow.com/questions/9254467/tuple-and-recursive-list-conversion

Reference NO 4

http://www.openbookproject.net/thinkcs/python/english2e/ch11.html

Reference NO 5

http://www.cs.cornell.edu/courses/cs312/2004fa/lectures/lecture3.htm

Reference NO 6

http://cseweb.ucsd.edu/classes/wi11/cse130/discussion/ocaml-intro2.pdf

Reference NO 7

http://en.wikibooks.org/wiki/How_to_Think_Like_a_Computer_Scientist:_Learning_with_Python_2nd_Edition/Recursion_and_exceptions

Reference NO 8

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