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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.

A228479 Number of n X 5 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically or antidiagonally.

Table of values

n a(n)
1 5
2 19
3 127
4 728
5 4354
6 25699
7 152373
8 902042
9 5342712
10 31639786
11 187379548
12 1109702480
13 6571916787
14 38920392611
15 230495519461
16 1365047364511
17 8084124028133
18 47876038862427
19 283532896714060
20 1679146925634733

List of values

[5, 19, 127, 728, 4354, 25699, 152373, 902042, 5342712, 31639786, 187379548, 1109702480, 6571916787, 38920392611, 230495519461, 1365047364511, 8084124028133, 47876038862427, 283532896714060, 1679146925634733]

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

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