Sequence (1, 4, 9, 16, 25, ...)

#include <stdio.h>
#include <math.h>

int main()
{
    for (int i = 1; i <= 100; i = (int)pow((sqrt((double)i)+1), 2))
    {
        printf("%i, ", i);
        // 1, 4, 9, 16, 25, 36, 49, 64, 81, 100
    }

    return 0;
}