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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.

A358696 Number of self-avoiding closed paths in the 5 X n grid graph which pass through all vertices on four (left, right, upper, lower) sides of the graph.

Table of values

n a(n)
2 1
3 5
4 36
5 191
6 1123
7 6410
8 37165
9 214515
10 1240200
11 7165033
12 41403125
13 239227616
14 1382302375
15 7987125379
16 46150853892
17 266666446637
18 1540838849619
19 8903196975232
20 51444004997119
21 297251155267189
22 1717561649837610
23 9924328164015589
24 57344252900906673
25 331343672343272500
26 1914553310297505893
27 11062575457823993391
28 63921216037276901284

List of values

[1, 5, 36, 191, 1123, 6410, 37165, 214515, 1240200, 7165033, 41403125, 239227616, 1382302375, 7987125379, 46150853892, 266666446637, 1540838849619, 8903196975232, 51444004997119, 297251155267189, 1717561649837610, 9924328164015589, 57344252900906673, 331343672343272500, 1914553310297505893, 11062575457823993391, 63921216037276901284]

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

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