>>> ' '.join(''.join(''.join(['' if i%3 else 'F',
                                      '' if i%5 else 'B'])
                             or str('00'))
                     for i in range(1,16))
'00 00 F 00 B F 00 00 F B 00 F 00 00 FB'
>>> _
'00 00 F 00 B F 00 00 F B 00 F 00 00 FB'
>>> _.replace('FB','11').replace('F','01').replace('B','10').split()[::-1]
['11', '00', '00', '01', '00', '10', '01', '00', '00', '01', '10', '00', '01', '00', '00']
>>> '0b' + ''.join(_)
'0b110000010010010000011000010000'
>>> eval(_)
810092048
>>>