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.

A197533 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,0,0 for x=0,1,2,3,4.

Table of values

n a(n)
1 5
2 33
3 216
4 1419
5 9373
6 62586
7 423085
8 2879723
9 19671764
10 134643523
11 922592723
12 6325665762
13 43386843099
14 297644913045
15 2042157812212
16 14012277918367
17 96148923597911
18 659765081841360
19 4527301927394765
20 31066516652385893

List of values

[5, 33, 216, 1419, 9373, 62586, 423085, 2879723, 19671764, 134643523, 922592723, 6325665762, 43386843099, 297644913045, 2042157812212, 14012277918367, 96148923597911, 659765081841360, 4527301927394765, 31066516652385893]

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

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