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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.

A076020 Number of systems with n elements with one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups). This gives numbers of systems which are isomorphic to their transpose but are noncommutative.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 3
6 6
7 24
8 178
9 1328

List of values

[0, 0, 0, 1, 3, 6, 24, 178, 1328]

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