cp's OEIS Frontend

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.

A196141 Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.

Table of values

n a(n)
1 4
2 8
3 7
4 26
5 49
6 85
7 178
8 348
9 683
10 1349
11 2688
12 5319
13 10498
14 20818
15 41206
16 81574
17 161646
18 320215
19 634294
20 1256481
21 2489029
22 4930656
23 9767642
24 19350237
25 38333645
26 75940498
27 150441579
28 298031468
29 590414638
30 1169642000
31 2317123308
32 4590345948

List of values

[4, 8, 7, 26, 49, 85, 178, 348, 683, 1349, 2688, 5319, 10498, 20818, 41206, 81574, 161646, 320215, 634294, 1256481, 2489029, 4930656, 9767642, 19350237, 38333645, 75940498, 150441579, 298031468, 590414638, 1169642000, 2317123308, 4590345948]

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

Content is available under The OEIS End-User License Agreement.