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.

A233157 Number of 4 X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally or antidiagonally.

Table of values

n a(n)
1 81
2 384
3 2592
4 17496
5 121176
6 842616
7 5871528
8 40931568
9 285366888
10 1989557640
11 13871104848
12 96708780360
13 674249796360
14 4700843090928
15 32774093555112
16 228499694410248
17 1593090904911120
18 11106967289377032
19 77437340197187976

List of values

[81, 384, 2592, 17496, 121176, 842616, 5871528, 40931568, 285366888, 1989557640, 13871104848, 96708780360, 674249796360, 4700843090928, 32774093555112, 228499694410248, 1593090904911120, 11106967289377032, 77437340197187976]

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

Content is available under The OEIS End-User License Agreement.