cp's OEIS Frontend

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.

A227005 Number of Hamiltonian circuits in a 2n X 2n square lattice of nodes, reduced for symmetry, where the orbits under the symmetry group of the square, D4, have 2 elements.

Table of values

n a(n)
1 0
2 1
3 4
4 20
5 346
6 6891
7 634172
8 47917598
9 27622729933
10 6998287399637

List of values

[0, 1, 4, 20, 346, 6891, 634172, 47917598, 27622729933, 6998287399637]

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

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