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.

A230172 Number of n X 4 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 9
2 1407
3 78849
4 4722977
5 284444079
6 17072965263
7 1027868078181
8 61861526624839
9 3721702070420191
10 223920929460093089
11 13473042937456532657
12 810647385075641076549
13 48774886700839338028985
14 2934683063063203660000047
15 176573841926955569266738003
16 10624082602448862037038864007

List of values

[9, 1407, 78849, 4722977, 284444079, 17072965263, 1027868078181, 61861526624839, 3721702070420191, 223920929460093089, 13473042937456532657, 810647385075641076549, 48774886700839338028985, 2934683063063203660000047, 176573841926955569266738003, 10624082602448862037038864007]