typedef struct _coefficients _coefficients;
                    struct _coefficients
                    {
                         _coefficients *next;
                         void *i;
                    }

                    //each one of these SHOULD generate a different number
                    _coefficients list[] = {
                        {.next = &list[1], .i = _rand}
                        {.next = &list[2], .i = _rand}
                        {.next = &list[3], .i = _rand}
                        {.next = &list[4], .i = _rand}
                        {.next = &list[5], .i = _rand}
                        {.next = NULL,     .i = _rand}
                    };