int main(void){
    unsigned long var[] = {};
    unsigned long i = 0, multiply = 2;

    for(i=0; i <= 21; i++){
        printf("%lu\n", i);
        var[i] = (i + 2);
        printf("%lu %lu %lu\n\n", i, i+2, var[i]);
    }
    return 0;
}