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.

A222453 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order.

Table of values

n a(n)
1 4
2 10
3 27
4 426
5 1847
6 16440
7 84558
8 910358
9 4757427
10 51324484
11 271866564
12 2984245628
13 15890235207
14 175650675430
15 939482925840
16 10439882627616
17 56035969028768
18 625001788261676
19 3364621225556746
20 37635020888605163

List of values

[4, 10, 27, 426, 1847, 16440, 84558, 910358, 4757427, 51324484, 271866564, 2984245628, 15890235207, 175650675430, 939482925840, 10439882627616, 56035969028768, 625001788261676, 3364621225556746, 37635020888605163]

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

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