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.

A207665 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

Table of values

n a(n)
1 35
2 1225
3 2748
4 30440
5 284108
6 1296732
7 12327618
8 111194040
9 568720390
10 5097396968
11 44256504494
12 245572154342
13 2110910392152
14 17764389355898
15 104925838177000
16 874050853859324
17 7172887272193780
18 44488820281290176

List of values

[35, 1225, 2748, 30440, 284108, 1296732, 12327618, 111194040, 568720390, 5097396968, 44256504494, 245572154342, 2110910392152, 17764389355898, 104925838177000, 874050853859324, 7172887272193780, 44488820281290176]

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

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