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.

A222675 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

n a(n)
1 4
2 10
3 58
4 527
5 8276
6 133028
7 2363628
8 40206464
9 727306856
10 12525102179
11 225526086320
12 3916711645116
13 70238669794180
14 1227292294581568
15 21942415435228510
16 385251466640023275
17 6872913615981792520

List of values

[4, 10, 58, 527, 8276, 133028, 2363628, 40206464, 727306856, 12525102179, 225526086320, 3916711645116, 70238669794180, 1227292294581568, 21942415435228510, 385251466640023275, 6872913615981792520]