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.

A301963 Number of n X 7 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 21
2 35
3 132
4 443
5 1803
6 7795
7 33860
8 148299
9 646838
10 2827081
11 12348295
12 53946658
13 235669276
14 1029543928
15 4497666250
16 19648472006
17 85836276153
18 374983965881
19 1638153628134
20 7156431645355
21 31263560215566
22 136577871103739

List of values

[21, 35, 132, 443, 1803, 7795, 33860, 148299, 646838, 2827081, 12348295, 53946658, 235669276, 1029543928, 4497666250, 19648472006, 85836276153, 374983965881, 1638153628134, 7156431645355, 31263560215566, 136577871103739]

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

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