%I #17 Jul 14 2020 07:43:54
%S 0,0,1067638,34524432316,1250063279938854,38350427205194670084,
%T 1254934986399237346242334,40157773188600794694366079616,
%U 1293153423896688571314211086231916,41575689378315795601749194654016984354,1337089200028352592236847382536061361269314
%N Number of closed Knight's tours on a 7 X 2n board.
%H Zhao Hui Du, <a href="/A193054/b193054.txt">Table of n, a(n) for n = 1..15</a>
%H <a href="http://bbs.emath.ac.cn/thread-3231-5-1.html">Chinese Web for the result</a> by KeyTo9_Fans
%Y Cf. A175881.
%K nonn
%O 1,3
%A _Zhao Hui Du_, Jul 15 2011
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