1 -10 - 298 - 55 - 91 - 136 - 190 - 253 - 325 - 406 - 496 - 595 - 703 - 820 - 946 - ...
Thus, the first few centered nonagonal numbers are:1, 10, 28, 55, 91, 136, 190, 253, 325, 406, 496, 595, 703, 820, 946.