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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.

A339854 Number of Hamiltonian circuits within parallelograms of size n X n on the triangular lattice.

Table of values

n a(n)
2 1
3 4
4 80
5 7104
6 3292184
7 6523266332
8 56203566442908
9 2176852129116199068
10 373334515946952014204102
11 281931891850296665963970600460
12 939652851372937937187518231503848142
13 13807942929878598929190143960742601141566220
14 893498265685263112931409501489577970162598024007690

List of values

[1, 4, 80, 7104, 3292184, 6523266332, 56203566442908, 2176852129116199068, 373334515946952014204102, 281931891850296665963970600460, 939652851372937937187518231503848142, 13807942929878598929190143960742601141566220, 893498265685263112931409501489577970162598024007690]

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

Content is available under The OEIS End-User License Agreement.