PGAEncodeIntegerAsGrayCode(3) on Linux
The text eea1c8b001e0, as Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.2 (Rex) shipped it. The page shows this text now.
encodes a real value as a binary reflected Gray code sequence