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.

A232157 Number of nX4 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.

Table of values

n a(n)
1 8
2 218
3 1284
4 7770
5 46702
6 286770
7 1767266
8 10830650
9 66701686
10 410364610
11 2522566124
12 15524673872
13 95489164864
14 587352257166
15 3613537440642
16 22227593479382
17 136734516680534
18 841147631122416
19 5174280907720634

List of values

[8, 218, 1284, 7770, 46702, 286770, 1767266, 10830650, 66701686, 410364610, 2522566124, 15524673872, 95489164864, 587352257166, 3613537440642, 22227593479382, 136734516680534, 841147631122416, 5174280907720634]