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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.

A077556 Meandric numbers for an undirected line crossing two perpendicular roads at n points, beginning in the (-,-) quadrant, crossing x axis first and ending in any quadrant.

Table of values

n a(n)
0 0
1 1
2 2
3 5
4 12
5 31
6 81
7 239

List of values

[0, 1, 2, 5, 12, 31, 81, 239]

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

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