Change counting problem from SICP in Scala

Change.scala

object Change  {

  val zeros = Stream.continually(0)

  def ways(denominations: Seq[Int]) = {
    denominations.foldLeft(zeros) { (previous, d) =>
      lazy val base: Stream[Int] = zeros.take(d - 1) ++ 1 #:: previous.zip(base).map { x => x._1 + x._2 }
      base.drop(d)
    }
  }

  def main(args: Array[String]) {
    val nums          = args.map(_.toInt)
    val amount        = nums.head
    val denominations = nums.tail
    println(ways(denominations)(amount))
  }
}