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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.

A007984 Number of essential graphs with n nodes (in 1-1 correspondence with Markov equivalence classes of acyclic digraphs).

Table of values

n a(n)
1 1
2 2
3 11
4 185
5 8782
6 1067825
7 312510571
8 212133402500
9 326266056291213
10 1118902054495975181
11 8455790399687227104576
12 139537050182278289405732939
13 4991058955493997577840793161279

List of values

[1, 2, 11, 185, 8782, 1067825, 312510571, 212133402500, 326266056291213, 1118902054495975181, 8455790399687227104576, 139537050182278289405732939, 4991058955493997577840793161279]

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

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