Following program will print pallindrome tree from provided input number by asking user input.

palindromeTree.go

/*
Following program will print pallindrome tree
from provided input number by asking user input.

A sample program outpust like:-

Enter any number:
9
        1        
       212       
      32123      
     4321234     
    543212345    
   65432123456   
  7654321234567  
 876543212345678 
98765432123456789
*/
package main

import (
    "fmt"
    "strconv"
)

func main() {
	var input int
	fmt.Println("Enter any number:")
	fmt.Scanf("%d", &input)
	if input > 0 && input < 10 {
		printSeries(input)
	} else {
		fmt.Println("Sorry Invalid Number. Please enter number from 1 and 9.")
	}
	
}

func printSeries(number int) {
    for i := 1; i <= number; i++ {
		spacePaddingCount := number - i
		emptyString := emptyString(spacePaddingCount)
		line := emptyString + generatePalindrome(i) + emptyString
		fmt.Println(line)
	}
}

func generatePalindrome(number int) string {
	palindrome := ""
	temp := number
    for i:=0; i < 2 * number - 1; i++ {
		palindrome += strconv.Itoa(temp)
		if i < number - 1 {
			temp -= 1
		} else {
			temp += 1
		}
	}
	return palindrome
}

func emptyString(number int) string {
	str := ""
	for n := 1; n <= number; n++ {
		str += " "
	}
	return str
}