Hi all seqfans, All the odd integers starting @ 5 cf = [5:7,9,11,13,15,17,19,21,23,...] The equation that solves it -- n =(1/(e^2 -7))*2 = 5.14064682573322848552... Thus the cf = [5:7,9,11,13,15,17,19,21,23,...] Dan