'Should be used when ``other`` is not a sequence. Should be
defined to define custom behaviour.
Examples
>>> from sympy import S, oo, SeqFormula
>>> from sympy.abc import n
>>> SeqFormula(n**2).coeff_mul(2)
SeqFormula(2*n**2, (n, 0, oo))
Notes
\'*\' defines multiplication of sequences with sequences only.'

def coeff_mul(self, other):

    return Mul(self, other)
