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.

A318543 Number of nX6 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 13
2 15
3 52
4 207
5 784
6 2905
7 10496
8 38721
9 144148
10 531780
11 1960675
12 7241505
13 26745797
14 98766587
15 364682042
16 1346615672
17 4972655637
18 18362061797
19 67803976370
20 250374735252
21 924538580895
22 3413971260050
23 12606503235153

List of values

[13, 15, 52, 207, 784, 2905, 10496, 38721, 144148, 531780, 1960675, 7241505, 26745797, 98766587, 364682042, 1346615672, 4972655637, 18362061797, 67803976370, 250374735252, 924538580895, 3413971260050, 12606503235153]

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

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