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.

A301396 Number of nX4 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 0
2 4
3 13
4 78
5 446
6 2619
7 15538
8 92338
9 549096
10 3267591
11 19445455
12 115733520
13 688822904
14 4099797460
15 24401669153
16 145237096500
17 864442371855
18 5145110443481
19 30623402361787
20 182268749291468
21 1084853268325407

List of values

[0, 4, 13, 78, 446, 2619, 15538, 92338, 549096, 3267591, 19445455, 115733520, 688822904, 4099797460, 24401669153, 145237096500, 864442371855, 5145110443481, 30623402361787, 182268749291468, 1084853268325407]

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

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