is_assignable_integer

abjad.mathtools.is_assignable_integer.is_assignable_integer(argument)

Is true when argument is equivalent to an integer that can be written without recourse to ties.

>>> for n in range(0, 16 + 1):
...     print('%s\t%s' % (n, abjad.mathtools.is_assignable_integer(n)))
...
0  False
1  True
2  True
3  True
4  True
5  False
6  True
7  True
8  True
9  False
10 False
11 False
12 True
13 False
14 True
15 True
16 True

Returns true or false.