I have run into some odd connections in my search for POW numbers. Two men with POW numbers close to the number I seek (3496) are Benjamin Derwin at 3493 and Walter Brand at 3491. Both were on the same plane. I have not found the POW numbers for any of the other enlisted men in that crew.
The MACR for the loss (B-17 44-8166 , shot down 13 September 1944) is here:
https://catalog.archives.gov/id/91058531
One member of the crew was William N Hess, 18210045. According to the US national archives, Hess was also at Stalag Luft IV, but I have not found his POW number. William N Hess wrote a great many aviation books after the war.
https://ospreypublishing.com/william-n-hess
https://www.thriftbooks.com/a/william-n-hess/423315/
In searching on his name I came across this photo of him:
http://www.americanairmuseum.com/media/11982
Note it is his serial number, but the photo is supposedly dated October, 1944, I think in error as he was a POW by then.
Hess died in 2019:
https://www.findagrave.com/memorial/...am-nelson-hess