Seqfans: I dispute A073615(5): 37, not 223. More terms: 5,11,13,101,37,1277,1279,1616603,57405419,51448351,76623356077, 115438255651991,433241801791933 > %C a(9) > 1734338611, a(10) = 51448351, a(11) > 131045797. No, yes, yes. -- Don Reble djr at nk.ca -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.