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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.

A297853 Number of n X 3 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 7
3 15
4 19
5 21
6 33
7 53
8 77
9 111
10 171
11 269
12 415
13 643
14 1013
15 1605
16 2543
17 4041
18 6451
19 10325
20 16547
21 26561
22 42705
23 68741
24 110743
25 178545
26 288053
27 464971
28 750861
29 1212959
30 1960023
31 3167961
32 5121325
33 8280457
34 13390095
35 21655079
36 35024669

List of values

[1, 7, 15, 19, 21, 33, 53, 77, 111, 171, 269, 415, 643, 1013, 1605, 2543, 4041, 6451, 10325, 16547, 26561, 42705, 68741, 110743, 178545, 288053, 464971, 750861, 1212959, 1960023, 3167961, 5121325, 8280457, 13390095, 21655079, 35024669]

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

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