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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A175855 The number of closed Knight's tours on a 5 X 2n board.

Table of values

n a(n)
1 0
2 0
3 8
4 44202
5 13311268
6 4557702762
7 1495135512514
8 491857035772330
9 161514101568508400
10 53034853662012222798
11 17414154188157170439208
12 5717847862749642677204182
13 1877435447920358266870897874
14 616447390029326136628439042672
15 202407848349722353779265745190616
16 66459727085467788423206394162537418
17 21821760546806761707309514948565417796
18 7165079447164571822068029945303172129766
19 2352622444655438705806553391345493395131580
20 772473271844923268504474277422663237674924998

List of values

[0, 0, 8, 44202, 13311268, 4557702762, 1495135512514, 491857035772330, 161514101568508400, 53034853662012222798, 17414154188157170439208, 5717847862749642677204182, 1877435447920358266870897874, 616447390029326136628439042672, 202407848349722353779265745190616, 66459727085467788423206394162537418, 21821760546806761707309514948565417796, 7165079447164571822068029945303172129766, 2352622444655438705806553391345493395131580, 772473271844923268504474277422663237674924998]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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