fibsequence.rb

$fib = Hash.new { |_,n| n < 2 ? n : $fib[n-1] + $fib[n-2] }

def fibsequence(n)
  (0...n).map{ |i| $fib[i] }.join(',')
end

100.times do |i|
  puts [i, fibsequence(i)].join(' - ')
end