Catalan numbers: Difference between revisions
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!*#~ddiFSFmSoFSn @til 15 |
!*#~ddiFSFmSoFSn @til 15 |
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; returns [1 1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674439.9999999995]</lang> |
; returns [1 1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674439.9999999995]</lang> |
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=={{header|XLISP}}== |
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<lang lisp>(defun catalan (n) |
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(if (= n 0) |
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1 |
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(* (/ (* 2 (- (* 2 n) 1)) (+ n 1)) (catalan (- n 1))) ) ) |
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(defun range (x y) |
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(cons x |
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(if (< x y) |
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(range (+ x 1) y) ) ) ) |
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(print (mapcar catalan (range 0 14)))</lang> |
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{{out}} |
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<pre>(1 1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674440)</pre> |
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=={{header|XPL0}}== |
=={{header|XPL0}}== |
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