Eric, You might find this sequence aesthetically appealing ;-) A039434 Numbers n such that representation in base 10 has same nonzero number of 6's and 9's. Regards, Jeremy Gardiner -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.seqfan.eu/pipermail/seqfan/attachments/20060207/a62271f8/attachment-0001.htm>