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.

A198908 Number of n X 2 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

n a(n)
1 1
2 4
3 34
4 500
5 10867
6 313132
7 10856948
8 418689772
9 17067989413
10 715189507700
11 30371156968582
12 1298083132473604
13 55654030558406039
14 2389712969490386908
15 102686352402421016536
16 4414019789796312628796
17 189771542890022982723145

List of values

[1, 4, 34, 500, 10867, 313132, 10856948, 418689772, 17067989413, 715189507700, 30371156968582, 1298083132473604, 55654030558406039, 2389712969490386908, 102686352402421016536, 4414019789796312628796, 189771542890022982723145]

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

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