%I A121767
%S A121767 0,1,4,26,148,908,5600,35358,225900,1460495,9528580,62659826,
%T A121767 414794388,2761665143,18478780624,124186579380,837825377160,
%U A121767 5671852529106,38515222492016,262266364986772,1790362225181496
%N A121767 Series expansion for first area weighted moment of osculating polygons 
               on square lattice.
%H A121767 I. Jensen, <a href="b121767.txt">Table of n, a(n) for n = 1..41</a> (from 
               link below)
%H A121767 I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/polygons/series/
               square.area_mom1.osculating.ser">More terms</a>
%Y A121767 Sequence in context: A053906 A100236 A144068 this_sequence A092167 A124544 
               A145840
%Y A121767 Adjacent sequences: A121764 A121765 A121766 this_sequence A121768 A121769 
               A121770
%K A121767 nonn
%O A121767 1,3
%A A121767 N. J. A. Sloane (njas(AT)research.att.com), Aug 30 2006