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.

A112850 Number of graph endomorphisms of undirected cycles of even length: |End(C_2n)|.

Table of values

n a(n)
1 2
2 32
3 132
4 576
5 2540
6 11112
7 48076
8 205952
9 875196
10 3695160
11 15519548
12 64899792
13 270415652
14 1123264856
15 4653525660
16 19234572544
17 79342611548
18 326704870872
19 1343120024476
20 5513861152880
21 22606830726564
22 92580354403768
23 378737813469692
24 1547884976788896
25 6320530321887700
26 25787763713301512

List of values

[2, 32, 132, 576, 2540, 11112, 48076, 205952, 875196, 3695160, 15519548, 64899792, 270415652, 1123264856, 4653525660, 19234572544, 79342611548, 326704870872, 1343120024476, 5513861152880, 22606830726564, 92580354403768, 378737813469692, 1547884976788896, 6320530321887700, 25787763713301512]

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

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