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.

A183578 Half the number of n X 3 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

Table of values

n a(n)
1 2
2 78
3 814
4 9667
5 110674
6 1282814
7 14823037
8 171459557
9 1982720806
10 22929915669
11 265174801858
12 3066662593835
13 35464903052433
14 410139828611289
15 4743130059530921
16 54852719114258196
17 634353415473617224

List of values

[2, 78, 814, 9667, 110674, 1282814, 14823037, 171459557, 1982720806, 22929915669, 265174801858, 3066662593835, 35464903052433, 410139828611289, 4743130059530921, 54852719114258196, 634353415473617224]

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

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