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.

A228751 Number of n X 5 binary arrays with top left element equal to 1 and no two ones adjacent horizontally or antidiagonally.

Table of values

n a(n)
1 5
2 50
3 482
4 4599
5 43862
6 418370
7 3990739
8 38067290
9 363121586
10 3463797759
11 33040991486
12 315176359538
13 3006451507579
14 28678390419458
15 273561730649282
16 2609491655262279
17 24891810279661862
18 237441732282894050

List of values

[5, 50, 482, 4599, 43862, 418370, 3990739, 38067290, 363121586, 3463797759, 33040991486, 315176359538, 3006451507579, 28678390419458, 273561730649282, 2609491655262279, 24891810279661862, 237441732282894050]

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

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