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.

A207240 Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 0 vertically.

Table of values

n a(n)
1 18
2 324
3 1526
4 7165
5 40838
6 197256
7 886959
8 4132837
9 18825154
10 83118767
11 366894032
12 1612009910
13 7003691520
14 30295384994
15 130694823493
16 561304207068
17 2402966839572
18 10265912202332
19 43759103277417
20 186155560434801

List of values

[18, 324, 1526, 7165, 40838, 197256, 886959, 4132837, 18825154, 83118767, 366894032, 1612009910, 7003691520, 30295384994, 130694823493, 561304207068, 2402966839572, 10265912202332, 43759103277417, 186155560434801]

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

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