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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.

A223505 Petersen graph (3,1) coloring a rectangular array: number of 2 X n 0..5 arrays where 0..5 label nodes of a graph with edges 0,1 0,3 3,5 3,4 1,2 1,4 4,5 2,0 2,5 and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an edge of this graph, with the array starting at 0.

Table of values

n a(n)
1 6
2 19
3 115
4 631
5 3539
6 19759
7 110427
8 617015
9 3447747
10 19265087
11 107648363
12 601511175
13 3361088979
14 18780896143
15 104942791931
16 586393188311
17 3276613524707
18 18308869209055
19 102305227390859
20 571655159691687

List of values

[6, 19, 115, 631, 3539, 19759, 110427, 617015, 3447747, 19265087, 107648363, 601511175, 3361088979, 18780896143, 104942791931, 586393188311, 3276613524707, 18308869209055, 102305227390859, 571655159691687]

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

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