Hello guys, i need help

Question

I want to do a pyramid, in this form

1
121
12321
1234321

The tall of the pyramid depend on number of rows
(4 in the example adove)

Answer 1

https://www.codesansar.com/c-programming-examples/generate-numeric-1-121-12321-pyramid-pattern.htm

Answer 2

What have you tried? Do you have some code or a psuedocode flowchart of your program?