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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A358648 Number of preference profiles of the stable roommates problem with 2n participants.

Original entry on oeis.org

1, 1296, 2985984000000, 416336312719673760153600000000, 39594086612242519324387557078266845776303882240000000000, 16363214235219603423192858350259453436046713251360764276842772299776000000000000000000000000
Offset: 1

Views

Author

Dan Eilers, Nov 24 2022

Keywords

Comments

Each participant ranks all participants other than themselves in strict order, giving (2n-1)! orderings for each of 2n participants.

Links

Crossrefs

Cf. A356584 (up to isomorphism), A185141 (Stable Marriage profiles), A001147 (possible roommate pairings).
Even bisection of A091868.

Programs

  • Mathematica
    Table[(2n-1)!^(2n), {n, 1, 6}]

Formula

a(n) = (2n-1)!^(2n).
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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