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.

A207455 Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 1 vertically.

Table of values

n a(n)
1 8
2 64
3 168
4 760
5 2560
6 10088
7 36456
8 138176
9 509960
10 1910296
11 7096320
12 26485576
13 98590024
14 367542080
15 1369032168
16 5101852856
17 19007490560
18 70825236904
19 263884411560
20 983242576576
21 3663494987848
22 13650146856152
23 50859864760320

List of values

[8, 64, 168, 760, 2560, 10088, 36456, 138176, 509960, 1910296, 7096320, 26485576, 98590024, 367542080, 1369032168, 5101852856, 19007490560, 70825236904, 263884411560, 983242576576, 3663494987848, 13650146856152, 50859864760320]

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

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