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.

A301666 Number of nX5 0..1 arrays with every element equal to 1, 2 or 4 horizontally or vertically adjacent elements, with upper left element zero.

Table of values

n a(n)
1 3
2 61
3 407
4 2793
5 21224
6 146841
7 1073621
8 7703565
9 55506215
10 399555430
11 2875870497
12 20706418377
13 149059329261
14 1073124611823
15 7725565402834
16 55617663607353
17 400401309675815
18 2882556650714509
19 20752023117855145

List of values

[3, 61, 407, 2793, 21224, 146841, 1073621, 7703565, 55506215, 399555430, 2875870497, 20706418377, 149059329261, 1073124611823, 7725565402834, 55617663607353, 400401309675815, 2882556650714509, 20752023117855145]

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

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