Multimagic square 16, 25, 36, 49, ... Sum of Squares 0, 1, 5, 14, 30, 55, 91, 140, 204, 285, ... )number of units in a square-based pyramid) The bimagic series is the 1st, 4th, 9th in this series (divided by 1, 2, 3, n) etc. so values for the rows and columns in order-1, order-2, order-3 Bimagic squares would be 1, 15, 95, 374, 1105, 2701, 5775, 11180, ... The trimagic series would be related in the same way to the hyper-pyramidal sequence of nested cubes. Cubes 0, 1, 8, 27, 64, 125, 216, ... Sum of Cubes 0, 1, 9,
1:64 scale years to generate more power. The so-called "HO" sized slot cars which were introduced in the 1960s at about , now average around 1:64 scale. Pictured is an early example of an approximately 1:64 slot car built by Aurora around 1972, as part of its AFX line. This first-generation AMC Matador coupe NASCAR race car replica is designed to fit on an enlarged chassis for nominal HO track. The 1:64 slot car lines include Micro Scalextric from the maker of the pioneering slot cars. Tomy-Aurora and Life-Like also produce cars that average close to 1:64. Mattel's diecast Hot Wheels Racing