Catalan numbers/Pascal's triangle: Difference between revisions

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=={{header|Lua}}==
For each line of odd-numbered length from Pascal's triangle, subtractprint the middle number fromminus the one immediately to its right. This solution is heavily based on the Lua code to generate Pascal's triangle on the page for that task.
This solution is heavily based on the Lua code to generate Pascal's triangle from the page for that task.
<lang Lua>function nextrow (t)
local ret = {}
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