Row k = A066136^(k)(n) contains (2^(k-2))-1 copies of "undefined" or as I notate "-1"; 2^(k-1) copies of 0; 2^k copies of each positive integer. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.seqfan.eu/pipermail/seqfan/attachments/20070103/ec90b7b9/attachment-0001.htm>