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.

A112849 Number of congruence classes (epimorphisms/vertex partitionings induced by graph endomorphisms) of undirected cycles of even length: |C(C_{2*n})|.

Table of values

n a(n)
1 1
2 4
3 11
4 36
5 127
6 463
7 1717
8 6436
9 24311
10 92379
11 352717
12 1352079
13 5200301
14 20058301
15 77558761
16 300540196
17 1166803111
18 4537567651
19 17672631901
20 68923264411
21 269128937221
22 1052049481861
23 4116715363801
24 16123801841551
25 63205303218877
26 247959266474053
27 973469712824057
28 3824345300380221
29 15033633249770521

List of values

[1, 4, 11, 36, 127, 463, 1717, 6436, 24311, 92379, 352717, 1352079, 5200301, 20058301, 77558761, 300540196, 1166803111, 4537567651, 17672631901, 68923264411, 269128937221, 1052049481861, 4116715363801, 16123801841551, 63205303218877, 247959266474053, 973469712824057, 3824345300380221, 15033633249770521]

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

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