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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.

A059052 Number of n-element unlabeled ordered T_0-antichains; T_1-hypergraphs (with empty hyperedge but without multiple hyperedges) on n labeled nodes.

Table of values

n a(n)
0 2
1 4
2 4
3 72
4 38040
5 4020463392
6 18438434825136728352
7 340282363593610211921722192165556850240
8 115792089237316195072053288318104625954343609704705784618785209431974668731584

List of values

[2, 4, 4, 72, 38040, 4020463392, 18438434825136728352, 340282363593610211921722192165556850240, 115792089237316195072053288318104625954343609704705784618785209431974668731584]

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

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