A proper order number for the nucleotide sequence of an oncogene of T24 human bladder carcinoma was calculated by a computer. The total oncogene was able to be shown by a proper order number by the alphabetical arrangement of nucleotides with terminal change. Many nucleotide sequences, such as plasmids, exons and introns, and viral origin are known and then many proper order number for these sequences can be calculated. As the proper order numbers are the continuous integers starting from 1, new nucleotide sequences will be obtained from unknown order numbers. These points were discussed.