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.

A282881 Number of nX4 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element.

Table of values

n a(n)
1 2
2 32
3 430
4 3762
5 34314
6 286920
7 2342046
8 18668994
9 146171090
10 1129426388
11 8631205392
12 65377140772
13 491525631332
14 3672205687546
15 27287152439396
16 201813637267634
17 1486474449573152
18 10909072654743782
19 79802389614658676

List of values

[2, 32, 430, 3762, 34314, 286920, 2342046, 18668994, 146171090, 1129426388, 8631205392, 65377140772, 491525631332, 3672205687546, 27287152439396, 201813637267634, 1486474449573152, 10909072654743782, 79802389614658676]

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

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