The answer, like most have said, is no. But, I did log some time in a Cheyenne 400LS as SIC. It is a "single pilot" airplane. I logged it because I was trained in it and took a FAA 135 checkride in it to be SIC. We operated it as a two pilot airplane. Remember that I was an ATP and took a FAA part 135 SIC checkride in it. That was good enough for me to log it as SIC.