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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.

A046994 Number of Greek-key tours on a 3 X n board; i.e., self-avoiding walks on a 3 X n grid starting in the top left corner.

Table of values

n a(n)
1 1
2 3
3 8
4 17
5 38
6 78
7 164
8 332
9 680
10 1368
11 2768
12 5552
13 11168
14 22368
15 44864
16 89792
17 179840
18 359808
19 720128
20 1440512
21 2882048
22 5764608
23 11531264
24 23063552
25 46131200
26 92264448
27 184537088
28 369078272
29 738172928
30 1476354048
31 2952740864
32 5905498112
33 11811061760
34 23622156288

List of values

[1, 3, 8, 17, 38, 78, 164, 332, 680, 1368, 2768, 5552, 11168, 22368, 44864, 89792, 179840, 359808, 720128, 1440512, 2882048, 5764608, 11531264, 23063552, 46131200, 92264448, 184537088, 369078272, 738172928, 1476354048, 2952740864, 5905498112, 11811061760, 23622156288]

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

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