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.

A208170 Number of n X 3 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 5
2 159
3 8469
4 473928
5 26625693
6 1496307201
7 84091222866
8 4725865313907
9 265590215430897
10 14925978329967384
11 838829205068709369
12 47141595663874099773
13 2649323638611897879018
14 148890075596000256587991

List of values

[5, 159, 8469, 473928, 26625693, 1496307201, 84091222866, 4725865313907, 265590215430897, 14925978329967384, 838829205068709369, 47141595663874099773, 2649323638611897879018, 148890075596000256587991]

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

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