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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.

A198902 Number of nX4 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

n a(n)
1 5
2 380
3 50384
4 6907736
5 948656912
6 130292546801
7 17895005957823
8 2457786852894234
9 337564362706067534
10 46362726246946052884
11 6367681611531782236418
12 874568266109492180669275

List of values

[5, 380, 50384, 6907736, 948656912, 130292546801, 17895005957823, 2457786852894234, 337564362706067534, 46362726246946052884, 6367681611531782236418, 874568266109492180669275]

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

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