n=$1
for (( i=1; i<=n; ++i )); do
   sp=$((n-i+1))
   printf "%${sp}d" 1 
  for (( j=2; j<=i; ++j )); do
  printf "%d" $j
  done
  for (( k=i-1; k>=1; --k )); do
   printf "%d" $k
  done
  printf "\n"
 done