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A193054
Number of closed Knight's tours on a 7 X 2n board.
1
0, 0, 1067638, 34524432316, 1250063279938854, 38350427205194670084, 1254934986399237346242334, 40157773188600794694366079616, 1293153423896688571314211086231916, 41575689378315795601749194654016984354, 1337089200028352592236847382536061361269314
OFFSET
1,3
CROSSREFS
Cf. A175881.
Sequence in context: A076248 A234776 A081638 * A160687 A342328 A070042
KEYWORD
nonn
AUTHOR
Zhao Hui Du, Jul 15 2011
STATUS
approved