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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.

A223434 Generalized Petersen graph (8,2) coloring a rectangular array: number of n X 2 0..15 arrays where 0..15 label nodes of a graph with edges 0,1 0,8 8,14 8,10 1,2 1,9 9,15 9,11 2,3 2,10 10,12 3,4 3,11 11,13 4,5 4,12 12,14 5,6 5,13 13,15 6,7 6,14 7,0 7,15 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.

Table of values

n a(n)
1 48
2 256
3 1376
4 7424
5 40160
6 217600
7 1180256
8 6405888
9 34782688
10 188912640
11 1026197344
12 5575016704
13 30289360608
14 164570543616
15 894181114976
16 4858543170304
17 26399224399840
18 143442922485760
19 779415220762976

List of values

[48, 256, 1376, 7424, 40160, 217600, 1180256, 6405888, 34782688, 188912640, 1026197344, 5575016704, 30289360608, 164570543616, 894181114976, 4858543170304, 26399224399840, 143442922485760, 779415220762976]

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

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