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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.

A205249 Number of (n+1) X 3 0..1 arrays with the number of clockwise edge increases in every 2 X 2 subblock the same.

Table of values

n a(n)
1 40
2 168
3 752
4 3416
5 15568
6 71000
7 323856
8 1477272
9 6738640
10 30738648
11 140215952
12 639602456
13 2917580368
14 13308696920
15 60708323856
16 276924225432
17 1263204479440
18 5762173946328
19 26284460772752
20 119897955971096
21 546920858309968

List of values

[40, 168, 752, 3416, 15568, 71000, 323856, 1477272, 6738640, 30738648, 140215952, 639602456, 2917580368, 13308696920, 60708323856, 276924225432, 1263204479440, 5762173946328, 26284460772752, 119897955971096, 546920858309968]

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

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