palindrome.scala

val answers = Iterator.from(10, 1).filter(
  Foo(_).test(isPalindrome)
)

println(answers.next)

def isPalindrome(base: String): Boolean =
  base == base.reverse

case class Foo(n: Integer) {
  lazy val decimal: String = Integer.toString(n)
  lazy val octal: String = Integer.toOctalString(n)
  lazy val binary: String = Integer.toBinaryString(n)

  def test(f: String => Boolean): Boolean =
    f(decimal) && f(octal) && f(binary)
}