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.

A207850 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.

Table of values

n a(n)
1 42
2 1764
3 6216
4 35952
5 185136
6 1006572
7 5346600
8 28935984
9 154692048
10 835671396
11 4480109592
12 24171724080
13 129787001904
14 699638944620
15 3760020085080
16 20257347370848
17 108927000309120
18 586630343266884
19 3155460147857976

List of values

[42, 1764, 6216, 35952, 185136, 1006572, 5346600, 28935984, 154692048, 835671396, 4480109592, 24171724080, 129787001904, 699638944620, 3760020085080, 20257347370848, 108927000309120, 586630343266884, 3155460147857976]

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

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