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Catalan numbers/Pascal's triangle: Difference between revisions
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1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674440 9694845
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=={{header|APL}}==
<lang apl>
⍝ Based heavily on the J solution
CATALAN←{¯1↓↑-/1 ¯1↓¨(⊂⎕IO+0 0)⍉¨0 2⌽¨⊂(⎕IO-⍨⍳N){+\⍣⍺⊢⍵}⍤0 1⊢1⍴⍨N←⍵+2}
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CATALAN 15
1 2 5 14 42 132 429 1430 4862 16796 58786 208012 742900 2674440 9694845
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