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.

A228657 Number of n X 5 binary arrays with top left value 1 and no two ones adjacent horizontally, diagonally or antidiagonally.

Table of values

n a(n)
1 5
2 38
3 335
4 2844
5 24109
6 203762
7 1720343
8 14516920
9 122469941
10 1033083774
11 8714026943
12 73500740436
13 619954240797
14 5229079954762
15 44105207907655
16 372009451809136
17 3137746452123621
18 26465592072488918
19 223226285220003247

List of values

[5, 38, 335, 2844, 24109, 203762, 1720343, 14516920, 122469941, 1033083774, 8714026943, 73500740436, 619954240797, 5229079954762, 44105207907655, 372009451809136, 3137746452123621, 26465592072488918, 223226285220003247]

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

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