cp's OEIS Frontend

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.

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A336525 Total number of linear extensions of all n-element posets.

Original entry on oeis.org

1, 1, 3, 14, 96, 895, 11751, 214708, 5594463
Offset: 0

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Author

Richard Stanley, Jul 27 2020

Keywords

Comments

Sum of e(P) over all nonisomorphic n-element posets, where e(P) is the number of linear extensions of P.

Examples

			There is one 3-element poset with 6 linear extensions, one with 3, two with 2, and one with 1, for a total of 14.

Crossrefs

Cf. A006251, A080687, A248091, A301871, A336229, A006455.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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