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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.

A333864 Number of Hamiltonian cycles on an n X 2*n grid.

Table of values

n a(n)
2 1
3 4
4 236
5 18684
6 32463802
7 54756073582
8 2365714170297014
9 87106950271042689032
10 88514516642574170326003422
11 71598455565101470929617326988084
12 1673219200189416324422979402201514800461
13 29815394539834813572600735261571894552950941626
14 15836807024750749574106724392556189684881848226515147589

List of values

[1, 4, 236, 18684, 32463802, 54756073582, 2365714170297014, 87106950271042689032, 88514516642574170326003422, 71598455565101470929617326988084, 1673219200189416324422979402201514800461, 29815394539834813572600735261571894552950941626, 15836807024750749574106724392556189684881848226515147589]

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

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