define ack(m, n) {
   if ( m == 0 ) return (n+1);
   if ( n == 0 ) return (ack(m-1, 1));
   return (ack(m-1, ack(m, n-1)));
}

for (n=0; n<7; n++) {
  for (m=0; m<4; m++) {
     print "A(", m, ",", n, ") = ", ack(m,n), "\n";
  }
}
quit