'Returns the term-wise addition of \'self\' and \'other\'.
``other`` should be a sequence.
Examples
>>> from sympy import S, oo, SeqFormula
>>> from sympy.abc import n
>>> SeqFormula(n**2) + SeqFormula(n**3)
SeqFormula(n**3 + n**2, (n, 0, oo))'

def __add__(self, other):

    if (not isinstance(other, SeqBase)):
        raise TypeError(('cannot    add    sequence    and    %s' % type(other)))
    return SeqAdd(self, other)
