Is n positive, negative, or zero? neg;
Is n + 1 positive, negative, or zero? neg;
Is n an integer? y;
Error: |$x| is not of type LIST.
Error signalled by SINRX.
The integral is of course divergent, but it should not be
getting an internal error. Why does it even ask whether
n is integral? Strangely, with n non-integer, it correctly