Print the pattern without for loop

Print following patterns without for loop.

Eg: 16 11 6 1 -4 1 6 11 16
Eg: 15 10 5 0 5 10 15

Program

package main
import (
 "fmt"
 "strconv"
)
func printPattern(num, curNum, decFactor int) {
 if decFactor < 0 && curNum > num {
  return
 }
 fmt.Print(strconv.Itoa(curNum) + " ")
 if curNum <= 0 {
  decFactor = -1 * decFactor
 }
 curNum = curNum - decFactor
 printPattern(num, curNum, decFactor)
}
func main() {
 printPattern(15, 15, 5)
}