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.

A208171 Number of nX4 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors.

Table of values

n a(n)
1 15
2 2277
3 473928
4 99752346
5 21002874867
6 4422202024212
7 931104734002155
8 196046229442844736
9 41277981610623482478
10 8691173355900504027213
11 1829946411015625966726620
12 385299398603702723040648261

List of values

[15, 2277, 473928, 99752346, 21002874867, 4422202024212, 931104734002155, 196046229442844736, 41277981610623482478, 8691173355900504027213, 1829946411015625966726620, 385299398603702723040648261]

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

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