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A193054
Number of closed Knight's tours on a 7 X 2n board.
5
0, 0, 1067638, 34524432316, 1250063279938854, 38350427205194670084, 1254934986399237346242334, 40157773188600794694366079616, 1293153423896688571314211086231916, 41575689378315795601749194654016984354, 1337089200028352592236847382536061361269314
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OFFSET
1,3
LINKS
Don Knuth, Table of n, a(n) for n = 1..21 (terms up to a(15) from Zhao Hui Du)
Chinese Web for the result by KeyTo9_Fans_Zhao Hui Du_
FORMULA
a(n) = A383663(7n). - Don Knuth, May 05 2025
CROSSREFS
Cf. A175881, A193055, A383663.
Sequence in context: A076248 A234776 A081638 * A160687 A342328 A070042
Adjacent sequences: A193051 A193052 A193053 * A193055 A193056 A193057
KEYWORD
nonn
AUTHOR
Zhao Hui Du, Jul 15 2011
STATUS
approved

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Last modified May 21 23:12 EDT 2026. Contains 395810 sequences.
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