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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.

A292793 1/4 of the number of self-avoiding paths that are made of alternated vertical and horizontal n consecutive steps. (start point is different from end point.)

Table of values

n a(n)
2 1
3 2
4 4
5 8
6 16
7 29
8 54
9 98
10 176
11 318
12 572
13 1026
14 1826
15 3255
16 5794
17 10233
18 18172
19 32012
20 56488
21 99469
22 175034
23 307479
24 540068
25 947235
26 1659907
27 2908958
28 5095019
29 8917677
30 15598100
31 27281252
32 47718310
33 83298748
34 145405769
35 253641303
36 442352671
37 770769569
38 1343166519
39 2339093953

List of values

[1, 2, 4, 8, 16, 29, 54, 98, 176, 318, 572, 1026, 1826, 3255, 5794, 10233, 18172, 32012, 56488, 99469, 175034, 307479, 540068, 947235, 1659907, 2908958, 5095019, 8917677, 15598100, 27281252, 47718310, 83298748, 145405769, 253641303, 442352671, 770769569, 1343166519, 2339093953]

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

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