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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.

A223604 Petersen graph (8,2) coloring a rectangular array: number of 6Xn 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, diagonal or antidiagonal neighbor moves along an edge of this graph.

Table of values

n a(n)
1 16777216
2 217600
3 21308000
4 982848688
5 77164934624
6 5493636282928
7 430525083804688
8 33412125075233264
9 2632417918238601216
10 207242362758169075664
11 16354092687858619453040
12 1290529367734515426273264

List of values

[16777216, 217600, 21308000, 982848688, 77164934624, 5493636282928, 430525083804688, 33412125075233264, 2632417918238601216, 207242362758169075664, 16354092687858619453040, 1290529367734515426273264]

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

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