Seven to the Seventh, by Charles Carreon49 is an octagonal number, showing it to be representable as a 7 X 7 square, which is composed of three concentric squares measuring 3, 5 and 7 on a side, arranged around the single, central, controlling square. Hence 9, 25, and 49 are the first three octagonal numbers, and they continue out infinitely. The next one up is eighty-one, the square of nine, and the next one up is 121, the square of 11.