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.

A228753 Number of nX7 binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.

Table of values

n a(n)
1 13
2 289
3 6277
4 134440
5 2876170
6 61534448
7 1316714732
8 28177227352
9 602998827928
10 12904414518912
11 276160275058160
12 5909958226524512
13 126475877308730464
14 2706643227463513344
15 57923438257867988416
16 1239588830689830585216

List of values

[13, 289, 6277, 134440, 2876170, 61534448, 1316714732, 28177227352, 602998827928, 12904414518912, 276160275058160, 5909958226524512, 126475877308730464, 2706643227463513344, 57923438257867988416, 1239588830689830585216]

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

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