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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Sylvesters-sequence/Ruby/sylvesters-sequence.rb Normal file
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def sylvester(n) = (1..n).reduce(2){|a| a*a - a + 1 }
(0..9).each {|n| puts "#{n}: #{sylvester n}" }
puts "
Sum of reciprocals of first 10 terms:
#{(0..9).sum{|n| 1.0r / sylvester(n)}.to_f }"