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.

A198522 Number of n X 2 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.

Table of values

n a(n)
1 2
2 15
3 193
4 3660
5 81844
6 1948672
7 47436498
8 1163606279
9 28617909415
10 704465305625
11 17346617064022
12 427184684002131
13 10520398796919219
14 259092051772297458
15 6380839372392481249
16 157145577058895542027

List of values

[2, 15, 193, 3660, 81844, 1948672, 47436498, 1163606279, 28617909415, 704465305625, 17346617064022, 427184684002131, 10520398796919219, 259092051772297458, 6380839372392481249, 157145577058895542027]

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

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