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.

A207677 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically.

Table of values

n a(n)
1 2
2 16
3 72
4 436
5 2310
6 11994
7 65564
8 379618
9 2306234
10 15546084
11 105736196
12 882008157
13 7460256028
14 79554888778
15 842718226878
16 10871887456045
17 151150820925264
18 2491064356652975
19 43353562677488606
20 900988265135221518

List of values

[2, 16, 72, 436, 2310, 11994, 65564, 379618, 2306234, 15546084, 105736196, 882008157, 7460256028, 79554888778, 842718226878, 10871887456045, 151150820925264, 2491064356652975, 43353562677488606, 900988265135221518]

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

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