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.

A199643 Number of nX4 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.

Table of values

n a(n)
1 2
2 60
3 1265
4 29229
5 658770
6 15066222
7 342328663
8 7797114144
9 177447181083
10 4039488090307
11 91947444344704
12 2092999963213610
13 47642308975551650
14 1084472533833020100
15 24685590900071146822
16 561912613968766782369

List of values

[2, 60, 1265, 29229, 658770, 15066222, 342328663, 7797114144, 177447181083, 4039488090307, 91947444344704, 2092999963213610, 47642308975551650, 1084472533833020100, 24685590900071146822, 561912613968766782369]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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