%I #4 Mar 30 2012 16:50:26
%S 1,4,6,16,20,48,52,123,120,292,244,658,462,1440,761,3111,1066,6696,
%T 804,14522,-1607,31915,-11438,71482,-42420,163414,-133102,381148,
%U -382217,906108,-1051033,2186855,-2802064,5347219,-7345761,13193786
%N Bond series for first parallel moment of hexagonal net.
%H I. Jensen, <a href="/A120542/b120542.txt">Table of n, a(n) for n = 0..300</a> [from link below]
%H I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/dirperc/series/hcbond_t1.ser">More terms</a>
%K sign
%O 0,2
%A _N. J. A. Sloane_, Aug 08 2006