sequence generator

i ? need a program that will generate alpha numeric numbers in the sequence which i deside. Like [login to view URL],C1,E1,A7,C7,E7,A13,C13,E13,A19,C19,E19,A25,C25, after this? E25 will come then A31 Similarly? B1,D1,F1,B7,D7 so on. these figures must be generated in a text file. ## Deliverables the sequence can be anything like B2,D2,F2,B8,D8,F8......n9999 the digita being asked by the program ? A4,C4,E4,A10,C10,E10?&#8364;??&#8364;??&#8364;??&#8364;?nx B4,D4,F4,B10,D10,F10?&#8364;??&#8364;??&#8364;?..nx B5,D5,F5,B11,D11,F11?&#8364;??&#8364;??&#8364;?..nx A6,C6,E6,A12,C12,E12?&#8364;??&#8364;??&#8364;?..nx B6,D6,F6,B12,D12,F12?&#8364;??&#8364;??&#8364;?..nx ? Where n= any alphabet, and x=number And so on. The text output should be in tabular form of one figer in one line <col width="64" style="width: 48pt;" /> <col width="64" style="width: 48pt;" /> <col width="64" style="width: 48pt;" /> | | | | | | | A1 | | C1 | | E1 | | A7 | | C7 | | E7 | | A13 | | C13 | | E13 | | A19 | | C19 | | E19 | | A25 | | C25 | | E25 |