Catalan numbers/Pascal's triangle: Difference between revisions
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1: { 1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674440 9694845 } |
1: { 1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674440 9694845 } |
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</pre> |
</pre> |
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Runs in 119 seconds on |
Runs in 119 seconds on an HP-28S. |
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===Fast, idiomatic approach=== |
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Using the built-in <code>COMB</code> function, which returns coefficients of Pascal's triangle: |
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≪ { } 1 15 '''FOR''' j |
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j DUP + j COMB LAST 1 - COMB - + '''NEXT''' |
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≫ EVAL |
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Same output than above, runs in 2.4 seconds on an HP-28S. |
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=={{header|Ruby}}== |
=={{header|Ruby}}== |
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