fibonacci.js

main()

function main () {
  let a = []
  for (let i = 0; i < 20; i++) {
    a.push(fibonacci(i))
  }
  console.log(a.join(' '))
}

function fibonacci (n) {
  if (n < 2) {
    return 1
  } else {
    return fibonacci(n - 1) + fibonacci(n - 2)
  }
}