9 lines
245 B
Lua
9 lines
245 B
Lua
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--more pedantic version, returns 0 for non-integer n
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function pfibs(n)
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if n ~= math.floor(n) then return 0
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elseif n < 0 then return pfibs(n + 2) - pfibs(n + 1)
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elseif n < 2 then return n
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else return pfibs(n - 1) + pfibs(n - 2)
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end
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end
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