Channel 4√4

Channel 4√4 is a fictional Earthican TV station, and likely a parody of Channel √2. A van with its logo appeared in a 3010 episode of The Scary Door.

Trivia

 * The fourth root of four is approximately 1.41421356, so Channel 4√4 could be called Channel 1.41421356.
 * Channel 4√4 being a parody of Channel √2 is likely considering 4√4 and √2 are equal numbers.