According to wikipedia, the original a value in 1988 was 16,807 (which is what you have now), but in 1993, responding to some criticism, the authors suggested changing the value of a to be 48,271. I don't understand why that's the case, but I would suggest you use the updated value too.
According to wikipedia, the original
avalue in 1988 was 16,807 (which is what you have now), but in 1993, responding to some criticism, the authors suggested changing the value ofato be 48,271. I don't understand why that's the case, but I would suggest you use the updated value too.