55Five

55 five$55.95. In Stock. Add to Cart. 1955 1956 9157 Chevy Hardtop, Nomad & Convertible Window Frame Screw Set ... 1955 1956 1957 Chevy Spare Tire Well Plug . $5.95. In Stock. Add to55 is a square pyramidal number. 55 is: . the 10th Fibonacci number [1] and the 10th triangular number, [2] The sum of 55's dits is also 10.; the 5th heptagonal number, [3] the 5th square