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.

A229601 Number of defective 3-colorings of an n X 3 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.

Table of values

n a(n)
1 1
2 39
3 396
4 3040
5 20714
6 131345
7 792929
8 4618048
9 26165860
10 145058507
11 790042315
12 4239980962
13 22473980838
14 117862612005
15 612450538677
16 3156938117780
17 16157454978232
18 82173962646319
19 415564115855215
20 2090880090793526

List of values

[1, 39, 396, 3040, 20714, 131345, 792929, 4618048, 26165860, 145058507, 790042315, 4239980962, 22473980838, 117862612005, 612450538677, 3156938117780, 16157454978232, 82173962646319, 415564115855215, 2090880090793526]