%I
%S 1,2,5,10,21,40,77,142,262,470,843,1486,2609,4529,7846,13448,23027,
%T 39096,66320,111795,187946,314844,526367,876362,1455579,2415059,
%U 3989542,6597538,10834513,17869253,29239356,48152477,78162313
%N Series for first perpendicular moment of square lattice bond percolation near a wall (eventually goes negative).
%C The 65th term is the first negative term.
%H I. Jensen, <a href="/A056599/b056599.txt">Table of n, a(n) for n = 0..174</a> (from link below)
%H I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/dirperc/series/sqbx1w.ser">More terms</a>
%K sign
%O 0,2
%A _N. J. A. Sloane_, Aug 27 2000
