The business information provider Dun & Bradstreet on Wednesday set the terms of its planned initial public offering, indicating it would sell $1.25 billion to $1.38 billion of shares. The Short Hills, N.J., company said in a statement that it intended to sell 65.8 million  common shares at $19 to $21 apiece. Dun & Bradstreet has applied to list the shares on the New York Stock Exchange with the ticker symbol DNB. The company in mid-May had confidentially submitted to the Securities and Exchange Commission a plan to go public.