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.

A205411 Number of (n+2)X6 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.

Table of values

n a(n)
1 236576
2 5686031
3 151598017
4 2839359056
5 67792717447
6 1715387177450
7 36803297869771
8 858554973465776
9 20804813475950945
10 468182020666807407
11 10859505355533459702
12 257344051938542231086
13 5904014034167014999764

List of values

[236576, 5686031, 151598017, 2839359056, 67792717447, 1715387177450, 36803297869771, 858554973465776, 20804813475950945, 468182020666807407, 10859505355533459702, 257344051938542231086, 5904014034167014999764]