The forty-niners were people who went to California seeking gold found in 1849 on Johann Sutter's farm.
gold
The forty niners were called the forty niners because the gold rush was in 1849.
The '49ers were named so due to the Gold Rush having began in 1849.
7 squared is 7 times 7- or 49. That would be the San Francisco 49ers.
The San Francisco 49ers became a part of the NFL in 1946. They initially played in the All-America Football Conference (AAFC) before the league merged with the NFL in 1949. The 49ers have since become one of the most storied franchises in NFL history.
3 - the San Francisco 49ers, Oakland Raiders, and the San Diego Chargers. There's a good possibility that the Raiders will once again relocate to L.A. again; the City of Oakland is unwilling to foot the bill for a new stadium, and playing in the ancient Oakland-Alameda Coliseum is both costly in terms of lost revenue, and insulting given the 49ers new facility across the Bay, which is a state-of-the-art marvel.